Nota
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Annotazioni
Questa funzionalità è attualmente disponibile in anteprima pubblica. Questa anteprima viene fornita senza un contratto di servizio e non è consigliata per i carichi di lavoro di produzione. Alcune funzionalità potrebbero non essere supportate o potrebbero presentare funzionalità limitate. Per altre informazioni, vedere le Condizioni supplementari per l'uso delle anteprime di Microsoft Azure.
In questa guida introduttiva, viene utilizzato il recupero agentico per creare un'esperienza di ricerca conversazionale basata su modelli di linguaggio di grandi dimensioni e sui tuoi dati proprietari. Il recupero agentico suddivide le query utente complesse in sottoquery, esegue le sottoquery in parallelo ed estrae i dati di base dai documenti indicizzati in Ricerca di intelligenza artificiale di Azure. L'output è destinato all'integrazione con soluzioni di chat agentiche e personalizzate.
Anche se è possibile fornire dati personalizzati, questo argomento di avvio rapido usa documenti JSON di esempio dell'e-book Earth at Night della NASA. I documenti descrivono argomenti scientifici generali e immagini della Terra di notte come osservato dallo spazio.
Suggerimento
Per iniziare a usare un notebook di Jupyter, vedere invece il repository Azure-Samples/azure-search-dotnet-samples in GitHub.
Prerequisiti
Un account Azure con una sottoscrizione attiva. Creare un account gratuito.
Un servizio ricerca di intelligenza artificiale di Azure sul livello Basic o superiore con semantic ranker abilitato.
Progetto Azure AI Foundry. Quando si crea un progetto Azure AI Foundry, si ottiene una risorsa di Azure AI Foundry (necessaria per le distribuzioni di modelli).
Interfaccia della riga di comando di Azure per l'autenticazione senza chiave con MICROSOFT Entra ID.
Configurare l'accesso in base al ruolo
È possibile usare le chiavi API del servizio di ricerca o Microsoft Entra ID con assegnazioni di ruolo. Le chiavi sono più facili da iniziare, ma i ruoli sono più sicuri.
Per configurare l'accesso basato sui ruoli consigliato:
Accedi al portale di Azure.
Abilitare l'accesso basato sui ruoli nel servizio Ricerca intelligenza artificiale di Azure.
Nel servizio Ricerca intelligenza artificiale di Azure assegnare a se stessi i ruoli seguenti .
Collaboratore servizi di ricerca
Collaboratore ai dati dell'indice di ricerca
Lettore di dati dell'indice di ricerca
Per il recupero agentico, Azure AI Search deve anche accedere alla risorsa Fonderia di Azure OpenAI.
Creare un'identità gestita assegnata dal sistema nel servizio Ricerca intelligenza artificiale di Azure. Ecco come eseguire questa operazione usando l'interfaccia della riga di comando di Azure:
az search service update --name YOUR-SEARCH-SERVICE-NAME --resource-group YOUR-RESOURCE-GROUP-NAME --identity-type SystemAssigned
Se si dispone già di un'identità gestita, è possibile ignorare questo passaggio.
Nella risorsa Azure AI Foundry, assegnare Utente dei Servizi cognitivi all'identità gestita che hai creato per il servizio di ricerca.
Distribuire modelli
Per usare il recupero agentico, è necessario distribuire uno dei modelli OpenAI di Azure supportati nella risorsa Azure AI Foundry:
Modello di chat per la pianificazione delle query e la generazione di risposte. In questo avvio rapido usiamo
gpt-4.1-mini
. Facoltativamente, è possibile usare un modello diverso per la pianificazione delle query e un altro per la generazione di risposte, ma questa guida introduttiva usa lo stesso modello per semplicità.Modello di incorporamento per le query vettoriali. In questo avvio rapido usiamo
text-embedding-3-large
, ma puoi usare qualsiasi modello di incorporamento che supporta l'attivitàtext-embedding
.
Per distribuire i modelli OpenAI di Azure:
Accedere al portale di Azure AI Foundry e selezionare la risorsa Azure AI Foundry.
Nel riquadro sinistro selezionare Catalogo modelli.
Selezionare gpt-4.1-mini e quindi selezionare Usa questo modello.
Specificare un nome di distribuzione. Per semplificare il codice, è consigliabile usare gpt-4.1-mini.
Lasciare le impostazioni predefinite.
Seleziona Distribuisci.
Ripeti i passaggi precedenti, ma questa volta utilizza il modello di embedding text-embedding-3-large.
Ottenere gli endpoint
Nel codice specificare gli endpoint seguenti per stabilire connessioni con il servizio Ricerca intelligenza artificiale di Azure e la risorsa Azure AI Foundry. Questi passaggi presuppongono che l'accesso basato sui ruoli sia stato configurato come descritto in precedenza.
Per ottenere gli endpoint di servizio:
Accedi al portale di Azure.
Nel servizio Ricerca intelligenza artificiale di Azure:
Nel riquadro sinistro selezionare Panoramica.
Copiare l'URL, che dovrebbe essere simile a
https://my-service.search.windows.net
.
Nella risorsa Azure AI Foundry:
Nel riquadro sinistro, selezionare Gestione risorse>Chiavi ed endpoint.
Selezionare la scheda OpenAI e copiare l'URL simile a
https://my-resource.openai.azure.com
.
Importante
Il recupero agentico ha due modelli di fatturazione basati su token:
- Fatturazione da Azure OpenAI per la pianificazione delle query.
- Fatturazione per l'esecuzione di query con Azure AI Search (classificazione semantica).
La classificazione semantica è gratuita nell'anteprima pubblica iniziale. Dopo l'anteprima, viene applicata la fatturazione standard dei token. Per altre informazioni, vedere Disponibilità e prezzi del recupero agentico.
Configurazione
Creare una nuova cartella
quickstart-agentic-retrieval
per contenere l'applicazione e aprire Visual Studio Code in tale cartella con il comando seguente:mkdir quickstart-agentic-retrieval && cd quickstart-agentic-retrieval
Creare una nuova applicazione console con il comando seguente:
dotnet new console
Installare la libreria client di Azure AI Search (Azure.Search.Documents) per .NET con:
dotnet add package Azure.Search.Documents --version 11.7.0-beta.4
Installare la libreria client OpenAI di Azure (Azure.AI.OpenAI) per .NET con:
dotnet add package Azure.AI.OpenAI --version 2.1.0
Installare il
dotenv
pacchetto per caricare le variabili di ambiente da un.env
file con:dotnet add package dotenv.net
Per l'autenticazione senza chiave consigliata con Microsoft Entra ID, installare il pacchetto Azure.Identity con:
dotnet add package Azure.Identity
Per l'autenticazione senza chiave consigliata con Microsoft Entra ID, accedere ad Azure con il comando seguente:
az login
Creare l'indice e l'agente di conoscenza
Creare un nuovo file denominato
.env
nellaquickstart-agentic-retrieval
cartella e aggiungere le variabili di ambiente seguenti:AZURE_OPENAI_ENDPOINT=https://<your-ai-foundry-resource-name>.openai.azure.com/ AZURE_OPENAI_GPT_DEPLOYMENT=gpt-4.1-mini AZURE_SEARCH_ENDPOINT=https://<your-search-service-name>.search.windows.net AZURE_SEARCH_INDEX_NAME=agentic-retrieval-sample
Sostituire
<your-search-service-name>
e<your-ai-foundry-resource-name>
con il nome effettivo del servizio Ricerca intelligenza artificiale di Azure e il nome della risorsa Azure AI Foundry.In Program.cs copiare e incollare il codice seguente.
using dotenv.net; using Azure.Identity; using Azure.Search.Documents.Indexes; using Azure.Search.Documents.Indexes.Models; using System.Net.Http; using System.Text.Json; using Azure.Search.Documents; using Azure.Search.Documents.Models; using Azure.Search.Documents.Agents; using Azure.Search.Documents.Agents.Models; using Azure.AI.OpenAI; using OpenAI.Chat; namespace AzureSearch.Quickstart { class Program { static async Task Main(string[] args) { // Load environment variables from .env file // Ensure you have a .env file in the same directory with the required variables. DotEnv.Load(); string endpoint = Environment.GetEnvironmentVariable("AZURE_SEARCH_ENDPOINT") ?? throw new InvalidOperationException("AZURE_SEARCH_ENDPOINT is not set."); string azureOpenAIEndpoint = Environment.GetEnvironmentVariable("AZURE_OPENAI_ENDPOINT") ?? throw new InvalidOperationException("AZURE_OPENAI_ENDPOINT is not set."); string azureOpenAIGptDeployment = "gpt-4.1-mini"; string azureOpenAIGptModel = "gpt-4.1-mini"; string azureOpenAIEmbeddingDeployment = "text-embedding-3-large"; string azureOpenAIEmbeddingModel = "text-embedding-3-large"; string indexName = "earth_at_night"; string agentName = "earth-search-agent"; var credential = new DefaultAzureCredential(); // Define the fields for the index var fields = new List<SearchField> { new SimpleField("id", SearchFieldDataType.String) { IsKey = true, IsFilterable = true, IsSortable = true, IsFacetable = true }, new SearchField("page_chunk", SearchFieldDataType.String) { IsFilterable = false, IsSortable = false, IsFacetable = false }, new SearchField("page_embedding_text_3_large", SearchFieldDataType.Collection(SearchFieldDataType.Single)) { VectorSearchDimensions = 3072, VectorSearchProfileName = "hnsw_text_3_large" }, new SimpleField("page_number", SearchFieldDataType.Int32) { IsFilterable = true, IsSortable = true, IsFacetable = true } };// Define the vectorizer var vectorizer = new AzureOpenAIVectorizer(vectorizerName: "azure_openai_text_3_large") { Parameters = new AzureOpenAIVectorizerParameters { ResourceUri = new Uri(azureOpenAIEndpoint), DeploymentName = azureOpenAIEmbeddingDeployment, ModelName = azureOpenAIEmbeddingModel } }; // Define the vector search profile and algorithm var vectorSearch = new VectorSearch() { Profiles = { new VectorSearchProfile( name: "hnsw_text_3_large", algorithmConfigurationName: "alg" ) { VectorizerName = "azure_openai_text_3_large" } }, Algorithms = { new HnswAlgorithmConfiguration(name: "alg") }, Vectorizers = { vectorizer } }; // Define semantic configuration var semanticConfig = new SemanticConfiguration( name: "semantic_config", prioritizedFields: new SemanticPrioritizedFields { ContentFields = { new SemanticField("page_chunk") } } ); var semanticSearch = new SemanticSearch() { DefaultConfigurationName = "semantic_config", Configurations = { semanticConfig } }; // Create the index var index = new SearchIndex(indexName) { Fields = fields, VectorSearch = vectorSearch, SemanticSearch = semanticSearch }; // Create the index client. Delete the index if it exists and then recreate it. var indexClient = new SearchIndexClient(new Uri(endpoint), credential); try { await indexClient.DeleteIndexAsync(indexName); Console.WriteLine($"Index '{indexName}' deleted successfully (if it existed)."); } catch (Exception ex) { Console.WriteLine($"Index '{indexName}' could not be deleted or did not exist: {ex.Message}"); } await indexClient.CreateOrUpdateIndexAsync(index); Console.WriteLine($"Index '{indexName}' created or updated successfully"); // Download the documents from the GitHub URL string url = "https://raw.githubusercontent.com/Azure-Samples/azure-search-sample-data/refs/heads/main/nasa-e-book/earth-at-night-json/documents.json"; var httpClient = new HttpClient(); var response = await httpClient.GetAsync(url); response.EnsureSuccessStatusCode(); var json = await response.Content.ReadAsStringAsync(); var documents = JsonSerializer.Deserialize<List<Dictionary<string, object>>>(json); var searchClient = new SearchClient(new Uri(endpoint), indexName, credential); var searchIndexingBufferedSender = new SearchIndexingBufferedSender<Dictionary<string, object>>( searchClient, new SearchIndexingBufferedSenderOptions<Dictionary<string, object>> { KeyFieldAccessor = doc => doc["id"].ToString(), } ); await searchIndexingBufferedSender.UploadDocumentsAsync(documents); await searchIndexingBufferedSender.FlushAsync(); Console.WriteLine($"Documents uploaded to index '{indexName}'"); var openAiParameters = new AzureOpenAIVectorizerParameters { ResourceUri = new Uri(azureOpenAIEndpoint), DeploymentName = azureOpenAIGptDeployment, ModelName = azureOpenAIGptModel }; var agentModel = new KnowledgeAgentAzureOpenAIModel(azureOpenAIParameters: openAiParameters); var targetIndex = new KnowledgeAgentTargetIndex(indexName) { DefaultRerankerThreshold = 2.5f }; // Create the knowledge agent var agent = new KnowledgeAgent( name: agentName, models: new[] { agentModel }, targetIndexes: new[] { targetIndex }); await indexClient.CreateOrUpdateKnowledgeAgentAsync(agent); Console.WriteLine($"Search agent '{agentName}' created or updated successfully"); string instructions = @" A Q&A agent that can answer questions about the Earth at night. Sources have a JSON format with a ref_id that must be cited in the answer. If you do not have the answer, respond with ""I don't know"". "; var messages = new List<Dictionary<string, object>> { new Dictionary<string, object> { { "role", "system" }, { "content", instructions } } }; var agentClient = new KnowledgeAgentRetrievalClient( endpoint: new Uri(endpoint), agentName: agentName, tokenCredential: new DefaultAzureCredential() ); messages.Add(new Dictionary<string, object> { { "role", "user" }, { "content", @" Why do suburban belts display larger December brightening than urban cores even though absolute light levels are higher downtown? Why is the Phoenix nighttime street grid is so sharply visible from space, whereas large stretches of the interstate between midwestern cities remain comparatively dim? " } }); var retrievalResult = await agentClient.RetrieveAsync( retrievalRequest: new KnowledgeAgentRetrievalRequest( messages: messages .Where(message => message["role"].ToString() != "system") .Select(message => new KnowledgeAgentMessage( role: message["role"].ToString(), content: new[] { new KnowledgeAgentMessageTextContent(message["content"].ToString()) })) .ToList() ) { TargetIndexParams = { new KnowledgeAgentIndexParams { IndexName = indexName, RerankerThreshold = 2.5f } } } ); messages.Add(new Dictionary<string, object> { { "role", "assistant" }, { "content", (retrievalResult.Value.Response[0].Content[0] as KnowledgeAgentMessageTextContent).Text } }); Console.WriteLine((retrievalResult.Value.Response[0].Content[0] as KnowledgeAgentMessageTextContent).Text); Console.WriteLine("Activities:"); foreach (var activity in retrievalResult.Value.Activity) { Console.WriteLine($"Activity Type: {activity.GetType().Name}"); string activityJson = JsonSerializer.Serialize( activity, activity.GetType(), new JsonSerializerOptions { WriteIndented = true } ); Console.WriteLine(activityJson); } Console.WriteLine("Results"); foreach (var reference in retrievalResult.Value.References) { Console.WriteLine($"Reference Type: {reference.GetType().Name}"); string referenceJson = JsonSerializer.Serialize( reference, reference.GetType(), new JsonSerializerOptions { WriteIndented = true } ); Console.WriteLine(referenceJson); } AzureOpenAIClient azureClient = new( new Uri(azureOpenAIEndpoint), new DefaultAzureCredential()); ChatClient chatClient = azureClient.GetChatClient(azureOpenAIGptDeployment); List<ChatMessage> chatMessages = messages .Select<Dictionary<string, object>, ChatMessage>(m => m["role"].ToString() switch { "user" => new UserChatMessage(m["content"].ToString()), "assistant" => new AssistantChatMessage(m["content"].ToString()), "system" => new SystemChatMessage(m["content"].ToString()), _ => null }) .Where(m => m != null) .ToList(); var result = await chatClient.CompleteChatAsync(chatMessages); Console.WriteLine($"[ASSISTANT]: {result.Value.Content[0].Text.Replace(".", "\n")}"); messages.Add(new Dictionary<string, object> { { "role", "user" }, { "content", "How do I find lava at night?" } }); var retrievalResult2 = await agentClient.RetrieveAsync( retrievalRequest: new KnowledgeAgentRetrievalRequest( messages: messages .Where(message => message["role"].ToString() != "system") .Select(message => new KnowledgeAgentMessage( role: message["role"].ToString(), content: new[] { new KnowledgeAgentMessageTextContent(message["content"].ToString()) })) .ToList() ) { TargetIndexParams = { new KnowledgeAgentIndexParams { IndexName = indexName, RerankerThreshold = 2.5f } } } ); messages.Add(new Dictionary<string, object> { { "role", "assistant" }, { "content", (retrievalResult2.Value.Response[0].Content[0] as KnowledgeAgentMessageTextContent).Text } }); Console.WriteLine((retrievalResult2.Value.Response[0].Content[0] as KnowledgeAgentMessageTextContent).Text); Console.WriteLine("Activities:"); foreach (var activity in retrievalResult2.Value.Activity) { Console.WriteLine($"Activity Type: {activity.GetType().Name}"); string activityJson2 = JsonSerializer.Serialize( activity, activity.GetType(), new JsonSerializerOptions { WriteIndented = true } ); Console.WriteLine(activityJson2); } Console.WriteLine("Results"); foreach (var reference in retrievalResult2.Value.References) { Console.WriteLine($"Reference Type: {reference.GetType().Name}"); string referenceJson2 = JsonSerializer.Serialize( reference, reference.GetType(), new JsonSerializerOptions { WriteIndented = true } ); Console.WriteLine(referenceJson2); } List<ChatMessage> chatMessages2 = messages .Select<Dictionary<string, object>, ChatMessage>(m => m["role"].ToString() switch { "user" => new UserChatMessage(m["content"].ToString()), "assistant" => new AssistantChatMessage(m["content"].ToString()), "system" => new SystemChatMessage(m["content"].ToString()), _ => null }) .Where(m => m != null) .ToList(); var result2 = await chatClient.CompleteChatAsync(chatMessages2); Console.WriteLine($"[ASSISTANT]: {result2.Value.Content[0].Text.Replace(".", "\n")}"); await indexClient.DeleteKnowledgeAgentAsync(agentName); System.Console.WriteLine($"Search agent '{agentName}' deleted successfully"); await indexClient.DeleteIndexAsync(indexName); System.Console.WriteLine($"Index '{indexName}' deleted successfully"); } } }
Compilare ed eseguire l'applicazione con il comando seguente:
dotnet run
Risultato
L'output dell'applicazione dovrebbe essere simile al seguente:
Index 'earth_at_night' deleted successfully (if it existed).
Index 'earth_at_night' created or updated successfully
Documents uploaded to index 'earth_at_night'
Search agent 'earth-search-agent' created or updated successfully
[]
Activities:
Activity Type: KnowledgeAgentModelQueryPlanningActivityRecord
{
"InputTokens": 1265,
"OutputTokens": 536,
"ElapsedMs": null,
"Id": 0
}
Activity Type: KnowledgeAgentSearchActivityRecord
{
"TargetIndex": "earth_at_night",
"Query": {
"Search": "Reasons for larger December brightening in suburban belts compared to urban cores despite higher absolute light levels downtown",
"Filter": null
},
"QueryTime": "2025-06-19T14:02:27.504+00:00",
"Count": 0,
"ElapsedMs": 768,
"Id": 1
}
Activity Type: KnowledgeAgentSearchActivityRecord
{
"TargetIndex": "earth_at_night",
"Query": {
"Search": "Why is the Phoenix nighttime street grid sharply visible from space while large stretches of interstate between Midwestern cities are comparatively dim?",
"Filter": null
},
"QueryTime": "2025-06-19T14:02:27.817+00:00",
"Count": 0,
"ElapsedMs": 292,
"Id": 2
}
Activity Type: KnowledgeAgentSemanticRankerActivityRecord
{
"InputTokens": 52609,
"ElapsedMs": null,
"Id": 3
}
Results
[ASSISTANT]: The suburban belts display larger December brightening than urban cores because suburban areas often have more residential lighting that increases during December holidays, such as decorative lights, leading to a noticeable rise in brightness
In contrast, urban cores already have very high absolute light levels, so the relative increase from additional lighting is less significant
Regarding Phoenix's nighttime street grid visibility from space, it is sharply visible because the city has a distinctive, well-lit, and uniformly spaced street grid pattern that emits consistent light
In contrast, large stretches of interstate highways between Midwestern cities remain comparatively dim because highways have less continuous lighting, with fewer lights spread over longer distances, making them less prominent from space [ref_id: night_earth_study_2021]
[{"ref_id":0,"content":"<!-- PageHeader=\"Volcanoes\" -->\n\n## Volcanoes\n\n### The Infrared Glows of Kilauea's Lava Flows—Hawaii\n\nIn early May 2018, an eruption on Hawaii's Kilauea volcano began to unfold. The eruption took a dangerous turn on May 3, 2018, when new fissures opened in the residential neighborhood of Leilani Estates. During the summer-long eruptive event, other fissures emerged along the East Rift Zone. Lava from vents along the rift zone flowed downslope, reaching the ocean in several areas, and filling in Kapoho Bay.\n\nA time series of Landsat 8 imagery shows the progression of the lava flows from May 16 to August 13. The night view combines thermal, shortwave infrared, and near-infrared wavelengths to tease out the very hot lava (bright white), cooling lava (red), and lava flows obstructed by clouds (purple).\n\n#### Figure: Location of Kilauea Volcano, Hawaii\n\nA globe is shown centered on North America, with a marker placed in the Pacific Ocean indicating the location of Hawaii, to the southwest of the mainland United States.\n\n<!-- PageFooter=\"Earth at Night\" -->\n<!-- PageNumber=\"44\" -->"},{"ref_id":1,"content":"<!-- PageHeader=\"Volcanoes\" -->\n\n### Nighttime Glow at Mount Etna - Italy\n\nAt about 2:30 a.m. local time on March 16, 2017, the VIIRS DNB on the Suomi NPP satellite captured this nighttime image of lava flowing on Mount Etna in Sicily, Italy. Etna is one of the world's most active volcanoes.\n\n#### Figure: Location of Mount Etna\nA world globe is depicted, with a marker indicating the location of Mount Etna in Sicily, Italy, in southern Europe near the center of the Mediterranean Sea.\n\n<!-- PageFooter=\"Earth at Night\" -->\n<!-- PageNumber=\"48\" -->"},{"ref_id":2,"content":"For the first time in perhaps a decade, Mount Etna experienced a \"flank eruption\"—erupting from its side instead of its summit—on December 24, 2018. The activity was accompanied by 130 earthquakes occurring over three hours that morning. Mount Etna, Europe’s most active volcano, has seen periodic activity on this part of the mountain since 2013. The Operational Land Imager (OLI) on the Landsat 8 satellite acquired the main image of Mount Etna on December 28, 2018.\n\nThe inset image highlights the active vent and thermal infrared signature from lava flows, which can be seen near the newly formed fissure on the southeastern side of the volcano. The inset was created with data from OLI and the Thermal Infrared Sensor (TIRS) on Landsat 8. Ash spewing from the fissure cloaked adjacent villages and delayed aircraft from landing at the nearby Catania airport. Earthquakes occurred in the subsequent days after the initial eruption and displaced hundreds of people from their homes.\n\nFor nighttime images of Mount Etna’s March 2017 eruption, see pages 48–51.\n\n---\n\n### Hazards of Volcanic Ash Plumes and Satellite Observation\n\nWith the help of moonlight, satellite instruments can track volcanic ash plumes, which present significant hazards to airplanes in flight. The volcanic ash—composed of tiny pieces of glass and rock—is abrasive to engine turbine blades, and can melt on the blades and other engine parts, causing damage and even engine stalls. This poses a danger to both the plane’s integrity and passenger safety. Volcanic ash also reduces visibility for pilots and can cause etching of windshields, further reducing pilots’ ability to see. Nightlight images can be combined with thermal images to provide a more complete view of volcanic activity on Earth’s surface.\n\nThe VIIRS Day/Night Band (DNB) on polar-orbiting satellites uses faint light sources such as moonlight, airglow (the atmosphere’s self-illumination through chemical reactions), zodiacal light (sunlight scattered by interplanetary dust), and starlight from the Milky Way. Using these dim light sources, the DNB can detect changes in clouds, snow cover, and sea ice:\n\n#### Table: Light Sources Used by VIIRS DNB\n\n| Light Source | Description
|\n|----------------------|------------------------------------------------------------------------------|\n| Moonlight | Reflected sunlight from the Moon, illuminating Earth's surface at night |\n| Airglow | Atmospheric self-illumination from chemical reactions |\n| Zodiacal Light | Sunlight scattered by interplanetary dust |\n| Starlight/Milky Way | Faint illumination provided by stars in the Milky Way |\n\nGeostationary Operational Environmental Satellites (GOES), managed by NOAA, orbit over Earth’s equator and offer uninterrupted observations of North America. High-latitude areas such as Alaska benefit from polar-orbiting satellites like Suomi NPP, which provide overlapping coverage at the poles, enabling more data collection in these regions. During polar darkness (winter months), VIIRS DNB data allow scientists to:\n\n- Observe sea ice formation\n- Monitor snow cover extent at the highest latitudes\n- Detect open water for ship navigation\n\n#### Table: Satellite Coverage Overview\n\n| Satellite Type | Orbit | Coverage Area | Special Utility |\n|------------------------|-----------------|----------------------|----------------------------------------------|\n| GOES
| Geostationary | Equatorial/North America | Continuous regional monitoring |\n| Polar-Orbiting (e.g., Suomi NPP) | Polar-orbiting | Poles/high latitudes | Overlapping passes; useful during polar night|\n\n---\n\n### Weather Forecasting and Nightlight Data\n\nThe use of nightlight data by weather forecasters is growing as the VIIRS instrument enables observation of clouds at night illuminated by sources such as moonlight and lightning. Scientists use these data to study the nighttime behavior of weather systems, including severe storms, which can develop and strike populous areas at night as well as during the day. Combined with thermal data, visible nightlight data allow the detection of clouds at various heights in the atmosphere, such as dense marine fog. This capability enables weather forecasters to issue marine advisories with higher confidence, leading to greater utility. (See \"Marine Layer Clouds—California\" on page 56.)\n\nIn this section of the book, you will see how nightlight data are used to observe nature’s spectacular light shows across a wide range of sources.\n\n---\n\n#### Notable Data from Mount Etna Flank Eruption (December 2018)\n\n| Event/Observation | Details
|\n|-------------------------------------|----------------------------------------------------------------------------|\n| Date of Flank Eruption | December 24, 2018 |\n| Number of Earthquakes | 130 earthquakes within 3 hours |\n| Image Acquisition | December 28, 2018 by Landsat 8 OLI
|\n| Location of Eruption | Southeastern side of Mount Etna
|\n| Thermal Imaging Data | From OLI and TIRS (Landsat 8), highlighting active vent and lava flows |\n| Impact on Villages/Air Transport | Ash covered villages; delayed aircraft at Catania airport |\n| Displacement
| Hundreds of residents displaced |\n| Ongoing Seismic Activity | Earthquakes continued after initial eruption
|\n\n---\n\n<!-- PageFooter=\"Earth at Night\" -->\n<!-- PageNumber=\"30\" -->"},{"ref_id":3,"content":"# Volcanoes\n\n---\n\n### Mount Etna Erupts - Italy\n\nThe highly active Mount Etna in Italy sent red lava rolling down its flank on March 19, 2017. An astronaut onboard the ISS took the photograph below of the volcano and its environs that night. City lights surround the mostly dark volcanic area.\n\n---\n\n#### Figure 1: Location of Mount Etna, Italy\n\nA world map highlighting the location of Mount Etna in southern Italy. The marker indicates its geographic placement on the east coast of Sicily, Italy, in the Mediterranean region, south of mainland Europe and north of northern Africa.\n\n---\n\n#### Figure 2: Nighttime View of Mount Etna's Eruption and Surrounding Cities\n\nThis is a nighttime satellite image taken on March 19, 2017, showing the eruption of Mount Etna (southeastern cone) with visible bright red and orange coloring indicating flowing lava from a lateral vent. The surrounding areas are illuminated by city lights, with the following geographic references labeled:\n\n| Location | Position in Image | Visible Characteristics
|\n|-----------------|--------------------------|--------------------------------------------|\n| Mt. Etna (southeastern cone) | Top center-left | Bright red/orange lava flow |\n| Lateral vent | Left of the volcano | Faint red/orange flow extending outwards |\n| Resort | Below the volcano, to the left | Small cluster of lights |\n| Giarre | Top right | Bright cluster of city lights |\n| Acireale | Center right | Large, bright area of city lights |\n| Biancavilla | Bottom left | Smaller cluster of city lights |\n\nAn arrow pointing north is shown on the image for orientation.\n\n---\n\n<!-- Earth at Night Page Footer -->\n<!-- Page Number: 50 -->"},{"ref_id":4,"content":"# Volcanoes\n\n## Figure: Satellite Image of Sicily and Mount Etna Lava, March 16, 2017\n\nThe annotated satellite image below shows the island of Sicily and the surrounding region at night, highlighting city lights and volcanic activity.\n\n**Description:**\n\n- **Date of image:** March 16, 2017\n- **Geographical locations labeled:**\n - Major cities: Palermo (northwest Sicily), Marsala (western Sicily), Catania (eastern Sicily)\n - Significant feature: Mount Etna, labeled with an adjacent \"hot lava\" region showing the glow from active lava flows\n - Surrounding water body: Mediterranean Sea\n - Island: Malta to the south of Sicily\n- **Other details:** \n - The image is shown at night, with bright spots indicating city lights.\n - The position of \"hot lava\" near Mount Etna is distinctly visible as a bright spot different from other city lights, indicating volcanic activity.\n - A scale bar is included showing a reference length of 50 km.\n - North direction is indicated with an arrow.\n - Cloud cover is visible in the southwest part of the image, partially obscuring the view near Marsala and Malta.\n\n**Summary of Features Visualized:**\n\n| Feature | Description
|\n|------------------|------------------------------------------------------|\n| Cities | Bright clusters indicating locations: Palermo, Marsala, Catania |\n| Mount Etna | Marked on the map, located on the eastern side of Sicily, with visible hot lava activity |\n| Malta | Clearly visible to the south of Sicily |\n| Water bodies | Mediterranean Sea labeled |\n| Scale & Direction| 50 km scale bar and North indicator |\n| Date | March 16, 2017
|\n| Cloud Cover | Visible in the lower left (southern) part of the image |\n\nThis figure demonstrates the visibility of volcanic activity at Mount Etna from space at night, distinguishing the light from hot lava against the background city lights of Sicily and Malta."},{"ref_id":5,"content":"## Nature's Light Shows\n\nAt night, with the light of the Sun removed, nature's brilliant glow from Earth's surface becomes visible to the naked eye from space. Some of Earth's most spectacular light shows are natural, like the aurora borealis, or Northern Lights, in the Northern Hemisphere (aurora australis, or Southern Lights, in the Southern Hemisphere). The auroras are natural electrical phenomena caused by charged particles that race from the Sun toward Earth, inducing chemical reactions in the upper atmosphere and creating the appearance of streamers of reddish or greenish light in the sky, usually near the northern or southern magnetic pole. Other natural lights can indicate danger, like a raging forest fire encroaching on a city, town, or community, or lava spewing from an erupting volcano.\n\nWhatever the source, the ability of humans to monitor nature's light shows at night has practical applications for society. For example, tracking fires during nighttime hours allows for continuous monitoring and enhances our ability to protect humans and other animals, plants, and infrastructure. Combined with other data sources, our ability to observe the light of fires at night allows emergency managers to more efficiently and accurately issue warnings and evacuation orders and allows firefighting efforts to continue through the night. With enough moonlight (e.g., full-Moon phase), it's even possible to track the movement of smoke plumes at night, which can impact air quality, regardless of time of day.\n\nAnother natural source of light at night is emitted from glowing lava flows at the site of active volcanoes. Again, with enough moonlight, these dramatic scenes can be tracked and monitored for both scientific research and public safety.\n\n\n### Figure: The Northern Lights Viewed from Space\n\n**September 17, 2011**\n\nThis photo, taken from the International Space Station on September 17, 2011, shows a spectacular display of the aurora borealis (Northern Lights) as green and reddish light in the night sky above Earth. In the foreground, part of a Soyuz spacecraft is visible, silhouetted against the bright auroral light. The green glow is generated by energetic charged particles from the Sun interacting with Earth's upper atmosphere, exciting oxygen and nitrogen atoms, and producing characteristic colors. The image demonstrates the vividness and grandeur of natural night-time light phenomena as seen from orbit."}]
Activities:
Activity Type: KnowledgeAgentModelQueryPlanningActivityRecord
{
"InputTokens": 1289,
"OutputTokens": 116,
"ElapsedMs": null,
"Id": 0
}
Activity Type: KnowledgeAgentSearchActivityRecord
{
"TargetIndex": "earth_at_night",
"Query": {
"Search": "How to locate lava flows at night?",
"Filter": null
},
"QueryTime": "2025-06-19T14:02:44.67+00:00",
"Count": 6,
"ElapsedMs": 235,
"Id": 1
}
Activity Type: KnowledgeAgentSemanticRankerActivityRecord
{
"InputTokens": 24807,
"ElapsedMs": null,
"Id": 2
}
Results
Reference Type: KnowledgeAgentAzureSearchDocReference
{
"DocKey": "earth_at_night_508_page_60_verbalized",
"SourceData": {},
"Id": "0",
"ActivitySource": 1
}
Reference Type: KnowledgeAgentAzureSearchDocReference
{
"DocKey": "earth_at_night_508_page_64_verbalized",
"SourceData": {},
"Id": "1",
"ActivitySource": 1
}
Reference Type: KnowledgeAgentAzureSearchDocReference
{
"DocKey": "earth_at_night_508_page_46_verbalized",
"SourceData": {},
"Id": "2",
"ActivitySource": 1
}
Reference Type: KnowledgeAgentAzureSearchDocReference
{
"DocKey": "earth_at_night_508_page_66_verbalized",
"SourceData": {},
"Id": "3",
"ActivitySource": 1
}
Reference Type: KnowledgeAgentAzureSearchDocReference
{
"DocKey": "earth_at_night_508_page_65_verbalized",
"SourceData": {},
"Id": "4",
"ActivitySource": 1
}
Reference Type: KnowledgeAgentAzureSearchDocReference
{
"DocKey": "earth_at_night_508_page_44_verbalized",
"SourceData": {},
"Id": "5",
"ActivitySource": 1
}
[ASSISTANT]: You can find lava at night primarily by using satellite imagery that captures the thermal and visible light emissions from active volcanoes
Very hot lava emits strong infrared radiation and glows visibly, which can be detected from space, especially when combined with moonlight or other faint light sources
For example, satellites like Landsat 8 and VIIRS on Suomi NPP have captured nighttime images of lava flows on volcanoes such as Kilauea in Hawaii and Mount Etna in Italy
These images show bright white-hot areas indicating very hot lava and reddish areas for cooling lava flows (ref_id 0, 1, 3, 4)
Lava glows visibly due to its intense heat, which makes it stand out even at night against the darkness and city lights
Nighttime satellite images combine thermal infrared wavelengths and near-infrared to distinguish active lava from surrounding cooler ground
Monitoring these nighttime glows allows scientists to study volcanic activity and also helps with hazard assessment
So, at night, the best way to find lava is through thermal and infrared satellite imagery that detects the glow and heat signatures of lava flows from active volcanoes
References: 0, 1, 3, 4
Search agent 'earth-search-agent' deleted successfully
Index 'earth_at_night' deleted successfully
Spiegazione del codice
Ora che si dispone del codice, è possibile suddividere i componenti chiave:
- Creare un indice di ricerca
- Caricare documenti nell'indice
- Creare un agente della conoscenza
- Configurare i messaggi
- Eseguire la pipeline di recupero
- Esaminare la risposta, l'attività e i risultati
- Creare il client OpenAI di Azure
- Usare l'API di Completamento chat per generare una risposta
- Continuare la conversazione
Creare un indice di ricerca
In Ricerca di intelligenza artificiale di Azure un indice è una raccolta strutturata di dati. Il codice seguente definisce un indice denominato earth_at_night
per contenere testo normale e contenuto vettoriale. È possibile usare un indice esistente, ma deve soddisfare i criteri per i carichi di lavoro di recupero agentici.
// Define the fields for the index
var fields = new List<SearchField>
{
new SimpleField("id", SearchFieldDataType.String) { IsKey = true, IsFilterable = true, IsSortable = true, IsFacetable = true },
new SearchField("page_chunk", SearchFieldDataType.String) { IsFilterable = false, IsSortable = false, IsFacetable = false },
new SearchField("page_embedding_text_3_large", SearchFieldDataType.Collection(SearchFieldDataType.Single)) { VectorSearchDimensions = 3072, VectorSearchProfileName = "hnsw_text_3_large" },
new SimpleField("page_number", SearchFieldDataType.Int32) { IsFilterable = true, IsSortable = true, IsFacetable = true }
};
// Define the vectorizer
var vectorizer = new AzureOpenAIVectorizer(vectorizerName: "azure_openai_text_3_large")
{
Parameters = new AzureOpenAIVectorizerParameters
{
ResourceUri = new Uri(azureOpenAIEndpoint),
DeploymentName = azureOpenAIEmbeddingDeployment,
ModelName = azureOpenAIEmbeddingModel
}
};
// Define the vector search profile and algorithm
var vectorSearch = new VectorSearch()
{
Profiles =
{
new VectorSearchProfile(
name: "hnsw_text_3_large",
algorithmConfigurationName: "alg"
)
{
VectorizerName = "azure_openai_text_3_large"
}
},
Algorithms =
{
new HnswAlgorithmConfiguration(name: "alg")
},
Vectorizers =
{
vectorizer
}
};
// Define semantic configuration
var semanticConfig = new SemanticConfiguration(
name: "semantic_config",
prioritizedFields: new SemanticPrioritizedFields
{
ContentFields = { new SemanticField("page_chunk") }
}
);
var semanticSearch = new SemanticSearch()
{
DefaultConfigurationName = "semantic_config",
Configurations =
{
semanticConfig
}
};
// Create the index
var index = new SearchIndex(indexName)
{
Fields = fields,
VectorSearch = vectorSearch,
SemanticSearch = semanticSearch
};
// Create the index client and delete the index if it exists, then create it
var indexClient = new SearchIndexClient(new Uri(endpoint), credential);
try
{
await indexClient.DeleteIndexAsync(indexName);
Console.WriteLine($"Index '{indexName}' deleted successfully (if it existed).");
}
catch (Exception ex)
{
Console.WriteLine($"Index '{indexName}' could not be deleted or did not exist: {ex.Message}");
}
await indexClient.CreateOrUpdateIndexAsync(index);
Console.WriteLine($"Index '{indexName}' created or updated successfully");
Lo schema dell'indice contiene campi per l'identificazione dei documenti e il contenuto della pagina, gli incorporamenti e i numeri. Include anche configurazioni per le query di classificazione semantica e vettoriali, che usano il text-embedding-3-large
modello distribuito in precedenza.
Caricare documenti nell'indice
Attualmente, l'indice earth_at_night
è vuoto. Eseguire il codice seguente per popolare l'indice con i documenti JSON dell'e-book Earth at Night della NASA. Come richiesto da Ricerca di intelligenza artificiale di Azure, ogni documento è conforme ai campi e ai tipi di dati definiti nello schema dell'indice.
// Download the documents from the GitHub URL
string url = "https://raw.githubusercontent.com/Azure-Samples/azure-search-sample-data/refs/heads/main/nasa-e-book/earth-at-night-json/documents.json";
var httpClient = new HttpClient();
var response = await httpClient.GetAsync(url);
response.EnsureSuccessStatusCode();
var json = await response.Content.ReadAsStringAsync();
var documents = JsonSerializer.Deserialize<List<Dictionary<string, object>>>(json);
var searchClient = new SearchClient(new Uri(endpoint), indexName, credential);
var searchIndexingBufferedSender = new SearchIndexingBufferedSender<Dictionary<string, object>>(
searchClient,
new SearchIndexingBufferedSenderOptions<Dictionary<string, object>>
{
KeyFieldAccessor = doc => doc["id"].ToString(),
}
);
await searchIndexingBufferedSender.UploadDocumentsAsync(documents);
await searchIndexingBufferedSender.FlushAsync();
Console.WriteLine($"Documents uploaded to index '{indexName}'");
Creare un agente di conoscenza
Per connettere Azure AI Search alla distribuzione gpt-4.1-mini
e impostare come destinazione l'indice earth_at_night
in fase di query, è necessario un agente di conoscenza. Il codice seguente definisce un agente di conoscenza denominato earth-search-agent
che usa il KnowledgeAgentAzureOpenAIModel
per elaborare le query e recuperare i documenti pertinenti dall'indice earth_at_night
.
Per garantire risposte rilevanti e semanticamente significative, DefaultRerankerThreshold
è impostata per escludere le risposte con un punteggio di reranker pari 2.5
o inferiore.
var openAiParameters = new AzureOpenAIVectorizerParameters
{
ResourceUri = new Uri(azureOpenAIEndpoint),
DeploymentName = azureOpenAIGptDeployment,
ModelName = azureOpenAIGptModel
};
var agentModel = new KnowledgeAgentAzureOpenAIModel(azureOpenAIParameters: openAiParameters);
var targetIndex = new KnowledgeAgentTargetIndex(indexName)
{
DefaultRerankerThreshold = 2.5f
};
// Create the knowledge agent
var agent = new KnowledgeAgent(
name: agentName,
models: new[] { agentModel },
targetIndexes: new[] { targetIndex });
await indexClient.CreateOrUpdateKnowledgeAgentAsync(agent);
Console.WriteLine($"Search agent '{agentName}' created or updated successfully");
Configurare i messaggi
I messaggi sono l'input per la route di recupero e contengono la cronologia delle conversazioni. Ogni messaggio include un ruolo che indica l'origine, ad esempio assistente o utente, e il contenuto in linguaggio naturale. L'LLM usato determina quali ruoli sono validi.
Un messaggio utente rappresenta la query da elaborare, mentre un messaggio di assistente guida l'agente della knowledge base su come rispondere. Durante il processo di recupero, questi messaggi vengono inviati a un LLM per estrarre le risposte pertinenti dai documenti indicizzati.
Questo messaggio di assistente indica earth-search-agent
di rispondere a domande sulla Terra di notte, citare le fonti usando il loro ref_id
e rispondere con "non lo so" quando le risposte non sono disponibili.
string instructions = @"
A Q&A agent that can answer questions about the Earth at night.
Sources have a JSON format with a ref_id that must be cited in the answer.
If you do not have the answer, respond with ""I don't know"".
";
var messages = new List<Dictionary<string, object>>
{
new Dictionary<string, object>
{
{ "role", "system" },
{ "content", instructions }
}
};
Eseguire la pipeline di recupero
Questo passaggio esegue la pipeline di recupero per estrarre informazioni rilevanti dall'indice di ricerca. In base ai messaggi e ai parametri della richiesta di recupero, l'LLM:
- Analizza l'intera cronologia delle conversazioni per determinare le informazioni sottostanti necessarie.
- Suddivide la query utente composta in sottoquery mirate.
- Esegue ogni sottoquery contemporaneamente su campi di testo e incorporamenti vettoriali nell'indice.
- Usa il classificatore semantico per riordinare i risultati di tutte le sottoquery.
- Unisce i risultati in una singola stringa.
Il codice seguente invia una query utente in due parti a earth-search-agent
, che decostruisce la query in sottoquery, esegue le sottoquery su entrambi i campi di testo e gli incorporamenti vettoriali nell'indice earth_at_night
e classifica e unisce i risultati. La risposta viene quindi aggiunta all'elenco messages
.
var agentClient = new KnowledgeAgentRetrievalClient(
endpoint: new Uri(endpoint),
agentName: agentName,
tokenCredential: new DefaultAzureCredential()
);
messages.Add(new Dictionary<string, object>
{
{ "role", "user" },
{ "content", @"
Why do suburban belts display larger December brightening than urban cores even though absolute light levels are higher downtown?
Why is the Phoenix nighttime street grid is so sharply visible from space, whereas large stretches of the interstate between midwestern cities remain comparatively dim?
" }
});
var retrievalResult = await agentClient.RetrieveAsync(
retrievalRequest: new KnowledgeAgentRetrievalRequest(
messages: messages
.Where(message => message["role"].ToString() != "system")
.Select(
message => new KnowledgeAgentMessage(
role: message["role"].ToString(),
content: new[] { new KnowledgeAgentMessageTextContent(message["content"].ToString()) }))
.ToList()
)
{
TargetIndexParams = { new KnowledgeAgentIndexParams { IndexName = indexName, RerankerThreshold = 2.5f } }
}
);
messages.Add(new Dictionary<string, object>
{
{ "role", "assistant" },
{ "content", (retrievalResult.Value.Response[0].Content[0] as KnowledgeAgentMessageTextContent).Text }
});
Esaminare la risposta, l'attività e i risultati
Ora si vuole visualizzare la risposta, l'attività e i risultati della pipeline di recupero.
Ogni risposta di recupero da Azure AI Search di Azure include:
Stringa unificata che rappresenta i dati di base dai risultati della ricerca.
Il piano di query.
Dati di riferimento che mostrano quali blocchi dei documenti di origine hanno contribuito alla stringa unificata.
Console.WriteLine((retrievalResult.Value.Response[0].Content[0] as KnowledgeAgentMessageTextContent).Text);
Console.WriteLine("Activities:");
foreach (var activity in retrievalResult.Value.Activity)
{
Console.WriteLine($"Activity Type: {activity.GetType().Name}");
string activityJson = JsonSerializer.Serialize(
activity,
activity.GetType(),
new JsonSerializerOptions { WriteIndented = true }
);
Console.WriteLine(activityJson);
}
Console.WriteLine("Results");
foreach (var reference in retrievalResult.Value.References)
{
Console.WriteLine($"Reference Type: {reference.GetType().Name}");
string referenceJson = JsonSerializer.Serialize(
reference,
reference.GetType(),
new JsonSerializerOptions { WriteIndented = true }
);
Console.WriteLine(referenceJson);
}
L'output deve includere:
Response
fornisce una stringa di testo dei documenti più rilevanti (o blocchi) nell'indice di ricerca in base alla query dell'utente. Come illustrato più avanti in questa guida introduttiva, è possibile passare questa stringa a un LLM per la generazione di risposte.Activity
tiene traccia dei passaggi eseguiti durante il processo di recupero, incluse le sottoquery generate dallagpt-4.1-mini
distribuzione e i token usati per la pianificazione e l'esecuzione delle query.Results
elenca i documenti che hanno contribuito alla risposta, ognuno identificato dal relativoDocKey
.
Creare il client OpenAI di Azure
Per estendere la pipeline di recupero dall'estrazione di risposte alla generazione di risposte, configurare il client Azure OpenAI per interagire con la distribuzione gpt-4.1-mini
, che è stata specificata usando la variabile answer_model
in una sezione precedente.
AzureOpenAIClient azureClient = new(
new Uri(azureOpenAIEndpoint),
new DefaultAzureCredential());
Usa l'API di completamento della chat per generare una risposta
Un'opzione per la generazione di risposte è l'API Completamento chat, che passa la cronologia delle conversazioni a LLM per l'elaborazione.
ChatClient chatClient = azureClient.GetChatClient(azureOpenAIGptDeployment);
List<ChatMessage> chatMessages = messages
.Select<Dictionary<string, object>, ChatMessage>(m => m["role"].ToString() switch
{
"user" => new UserChatMessage(m["content"].ToString()),
"assistant" => new AssistantChatMessage(m["content"].ToString()),
"system" => new SystemChatMessage(m["content"].ToString()),
_ => null
})
.Where(m => m != null)
.ToList();
var result = await chatClient.CompleteChatAsync(chatMessages);
Console.WriteLine($"[ASSISTANT]: {result.Value.Content[0].Text.Replace(".", "\n")}");
Continuare la conversazione
Per continuare la conversazione, invia un'altra query utente a earth-search-agent
. Il codice seguente esegue nuovamente la pipeline di recupero, recuperando il contenuto pertinente dall'indice earth_at_night
e accodando la risposta all'elenco messages
. Tuttavia, a differenza di prima, è ora possibile usare il client OpenAI di Azure per generare una risposta in base al contenuto recuperato.
messages.Add(new Dictionary<string, object>
{
{ "role", "user" },
{ "content", "How do I find lava at night?" }
});
var retrievalResult2 = await agentClient.RetrieveAsync(
retrievalRequest: new KnowledgeAgentRetrievalRequest(
messages: messages
.Where(message => message["role"].ToString() != "system")
.Select(
message => new KnowledgeAgentMessage(
role: message["role"].ToString(),
content: new[] { new KnowledgeAgentMessageTextContent(message["content"].ToString()) }))
.ToList()
)
{
TargetIndexParams = { new KnowledgeAgentIndexParams { IndexName = indexName, RerankerThreshold = 2.5f } }
}
);
messages.Add(new Dictionary<string, object>
{
{ "role", "assistant" },
{ "content", (retrievalResult2.Value.Response[0].Content[0] as KnowledgeAgentMessageTextContent).Text }
});
Pulire le risorse
Quando si lavora nel proprio abbonamento, è consigliabile completare un progetto determinando se sono ancora necessarie le risorse create. Le risorse lasciate in esecuzione possono avere un costo. È possibile eliminare le risorse singolarmente oppure eliminare il gruppo di risorse per eliminare l'intero set di risorse.
Nel portale di Azure è possibile trovare e gestire le risorse selezionando Tutte le risorse o Gruppi di risorse nel riquadro sinistro. È anche possibile eseguire il codice seguente per eliminare gli oggetti creati in questa guida introduttiva.
Eliminare l'agente di conoscenza
L'agente di conoscenza creato in questa guida introduttiva è stato eliminato usando il frammento di codice seguente da Program.cs:
await indexClient.DeleteKnowledgeAgentAsync(agentName);
Console.WriteLine($"Search agent '{agentName}' deleted successfully");
Eliminare l'indice di ricerca
L'indice di ricerca creato in questa guida introduttiva è stato eliminato usando il frammento di codice seguente da Program.cs:
await indexClient.DeleteIndexAsync(indexName);
Console.WriteLine($"Index '{indexName}' deleted successfully");
Annotazioni
Questa funzionalità è attualmente disponibile in anteprima pubblica. Questa anteprima viene fornita senza un contratto di servizio e non è consigliata per i carichi di lavoro di produzione. Alcune funzionalità potrebbero non essere supportate o potrebbero presentare funzionalità limitate. Per altre informazioni, vedere le Condizioni supplementari per l'uso delle anteprime di Microsoft Azure.
In questa guida introduttiva, viene utilizzato il recupero agentico per creare un'esperienza di ricerca conversazionale basata su modelli di linguaggio di grandi dimensioni e sui tuoi dati proprietari. Il recupero agentico suddivide le query utente complesse in sottoquery, esegue le sottoquery in parallelo ed estrae i dati di base dai documenti indicizzati in Ricerca di intelligenza artificiale di Azure. L'output è destinato all'integrazione con soluzioni di chat agentiche e personalizzate.
Anche se è possibile fornire dati personalizzati, questo argomento di avvio rapido usa documenti JSON di esempio dell'e-book Earth at Night della NASA. I documenti descrivono argomenti scientifici generali e immagini della Terra di notte come osservato dallo spazio.
Questa guida introduttiva si basa sul Jupyter Notebook Quickstart-Agentic-Retrieval in GitHub.
Prerequisiti
Un account Azure con una sottoscrizione attiva. Creare un account gratuito.
Un servizio ricerca di intelligenza artificiale di Azure sul livello Basic o superiore con semantic ranker abilitato.
Progetto Azure AI Foundry. Quando si crea un progetto Azure AI Foundry, si ottiene una risorsa di Azure AI Foundry (necessaria per le distribuzioni di modelli).
Visual Studio Code con l'estensione Python e il pacchetto Jupyter.
Interfaccia della riga di comando di Azure per l'autenticazione senza chiave con MICROSOFT Entra ID.
Configurare l'accesso in base al ruolo
È possibile usare le chiavi API del servizio di ricerca o Microsoft Entra ID con assegnazioni di ruolo. Le chiavi sono più facili da iniziare, ma i ruoli sono più sicuri.
Per configurare l'accesso basato sui ruoli consigliato:
Accedi al portale di Azure.
Abilitare l'accesso basato sui ruoli nel servizio Ricerca intelligenza artificiale di Azure.
Nel servizio Ricerca intelligenza artificiale di Azure assegnare a se stessi i ruoli seguenti .
Collaboratore servizi di ricerca
Collaboratore ai dati dell'indice di ricerca
Lettore di dati dell'indice di ricerca
Per il recupero agentico, Azure AI Search deve anche accedere alla risorsa Fonderia di Azure OpenAI.
Creare un'identità gestita assegnata dal sistema nel servizio Ricerca intelligenza artificiale di Azure. Ecco come eseguire questa operazione usando l'interfaccia della riga di comando di Azure:
az search service update --name YOUR-SEARCH-SERVICE-NAME --resource-group YOUR-RESOURCE-GROUP-NAME --identity-type SystemAssigned
Se si dispone già di un'identità gestita, è possibile ignorare questo passaggio.
Nella risorsa Azure AI Foundry, assegnare Utente dei Servizi cognitivi all'identità gestita che hai creato per il servizio di ricerca.
Distribuire modelli
Per usare il recupero agentico, è necessario distribuire uno dei modelli OpenAI di Azure supportati nella risorsa Azure AI Foundry:
Modello di chat per la pianificazione delle query e la generazione di risposte. In questo avvio rapido usiamo
gpt-4.1-mini
. Facoltativamente, è possibile usare un modello diverso per la pianificazione delle query e un altro per la generazione di risposte, ma questa guida introduttiva usa lo stesso modello per semplicità.Modello di incorporamento per le query vettoriali. In questo avvio rapido usiamo
text-embedding-3-large
, ma puoi usare qualsiasi modello di incorporamento che supporta l'attivitàtext-embedding
.
Per distribuire i modelli OpenAI di Azure:
Accedere al portale di Azure AI Foundry e selezionare la risorsa Azure AI Foundry.
Nel riquadro sinistro selezionare Catalogo modelli.
Selezionare gpt-4.1-mini e quindi selezionare Usa questo modello.
Specificare un nome di distribuzione. Per semplificare il codice, è consigliabile usare gpt-4.1-mini.
Lasciare le impostazioni predefinite.
Seleziona Distribuisci.
Ripeti i passaggi precedenti, ma questa volta utilizza il modello di embedding text-embedding-3-large.
Ottenere gli endpoint
Nel codice specificare gli endpoint seguenti per stabilire connessioni con il servizio Ricerca intelligenza artificiale di Azure e la risorsa Azure AI Foundry. Questi passaggi presuppongono che l'accesso basato sui ruoli sia stato configurato come descritto in precedenza.
Per ottenere gli endpoint di servizio:
Accedi al portale di Azure.
Nel servizio Ricerca intelligenza artificiale di Azure:
Nel riquadro sinistro selezionare Panoramica.
Copiare l'URL, che dovrebbe essere simile a
https://my-service.search.windows.net
.
Nella risorsa Azure AI Foundry:
Nel riquadro sinistro, selezionare Gestione risorse>Chiavi ed endpoint.
Selezionare la scheda OpenAI e copiare l'URL simile a
https://my-resource.openai.azure.com
.
Importante
Il recupero agentico ha due modelli di fatturazione basati su token:
- Fatturazione da Azure OpenAI per la pianificazione delle query.
- Fatturazione per l'esecuzione di query con Azure AI Search (classificazione semantica).
La classificazione semantica è gratuita nell'anteprima pubblica iniziale. Dopo l'anteprima, viene applicata la fatturazione standard dei token. Per altre informazioni, vedere Disponibilità e prezzi del recupero agentico.
Connettersi dal sistema locale
L'accesso basato sui ruoli è stato configurato per interagire con Ricerca di intelligenza artificiale di Azure e Azure OpenAI.
Per connettersi dal sistema locale:
Aprire un nuovo terminale in Visual Studio Code e passare alla directory in cui salvare i file.
Esegui il seguente comando CLI di Azure ed effettua l'accesso con il tuo account Azure. Se si hanno più sottoscrizioni, selezionare quella che contiene il servizio Ricerca intelligenza artificiale di Azure e il progetto Azure AI Foundry.
az login
Per altre informazioni, vedere Avvio rapido: Connettersi senza chiavi.
Installare pacchetti e caricare connessioni
Prima di eseguire qualsiasi codice, installare pacchetti Python e definire credenziali, endpoint e dettagli di distribuzione per le connessioni a Ricerca di intelligenza artificiale di Azure e Azure OpenAI. Questi valori vengono usati nelle operazioni successive.
Per installare i pacchetti e caricare le connessioni:
In Visual Studio Code creare un
.ipynb
file. Ad esempio, è possibile denominare il filequickstart-agentic-retrieval.ipynb
.Nella prima cella di codice incollare il codice seguente per installare i pacchetti necessari.
! pip install azure-search-documents==11.6.0b12 --quiet ! pip install azure-identity --quiet ! pip install openai --quiet ! pip install aiohttp --quiet ! pip install ipykernel --quiet ! pip install requests --quiet
È possibile eseguire questa cella selezionando il pulsante Esegui cella o premendo
Shift+Enter
.Aggiungere un'altra cella di codice e incollare le seguenti istruzioni di importazione e variabili.
from azure.identity import DefaultAzureCredential, get_bearer_token_provider import os endpoint = "PUT YOUR SEARCH SERVICE ENDPOINT HERE" credential = DefaultAzureCredential() token_provider = get_bearer_token_provider(credential, "https://search.azure.com/.default") azure_openai_endpoint = "PUT YOUR AZURE AI FOUNDRY ENDPOINT HERE" azure_openai_gpt_deployment = "gpt-4.1-mini" azure_openai_gpt_model = "gpt-4.1-mini" azure_openai_api_version = "2025-03-01-preview" azure_openai_embedding_deployment = "text-embedding-3-large" azure_openai_embedding_model = "text-embedding-3-large" index_name = "earth_at_night" agent_name = "earth-search-agent" answer_model = "gpt-4.1-mini" api_version = "2025-05-01-Preview"
Imposta
endpoint
sul tuo endpoint di Ricerca AI di Azure, che appare simile ahttps://<your-search-service-name>.search.windows.net.
. Impostaazure_openai_endpoint
sul tuo endpoint di Azure AI Foundry, che appare simile ahttps://<your-foundry-resource-name>.openai.azure.com.
. Hai ottenuto entrambi i valori nella sezione Ottenere gli endpoint.Per verificare le variabili, eseguire la cella di codice.
Creare un indice di ricerca
In Ricerca di intelligenza artificiale di Azure un indice è una raccolta strutturata di dati. Il codice seguente definisce un indice denominato earth_at_night
, specificato usando la index_name
variabile nella sezione precedente.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
from azure.search.documents.indexes.models import SearchIndex, SearchField, VectorSearch, VectorSearchProfile, HnswAlgorithmConfiguration, AzureOpenAIVectorizer, AzureOpenAIVectorizerParameters, SemanticSearch, SemanticConfiguration, SemanticPrioritizedFields, SemanticField
from azure.search.documents.indexes import SearchIndexClient
index = SearchIndex(
name=index_name,
fields=[
SearchField(name="id", type="Edm.String", key=True, filterable=True, sortable=True, facetable=True),
SearchField(name="page_chunk", type="Edm.String", filterable=False, sortable=False, facetable=False),
SearchField(name="page_embedding_text_3_large", type="Collection(Edm.Single)", stored=False, vector_search_dimensions=3072, vector_search_profile_name="hnsw_text_3_large"),
SearchField(name="page_number", type="Edm.Int32", filterable=True, sortable=True, facetable=True)
],
vector_search=VectorSearch(
profiles=[VectorSearchProfile(name="hnsw_text_3_large", algorithm_configuration_name="alg", vectorizer_name="azure_openai_text_3_large")],
algorithms=[HnswAlgorithmConfiguration(name="alg")],
vectorizers=[
AzureOpenAIVectorizer(
vectorizer_name="azure_openai_text_3_large",
parameters=AzureOpenAIVectorizerParameters(
resource_url=azure_openai_endpoint,
deployment_name=azure_openai_embedding_deployment,
model_name=azure_openai_embedding_model
)
)
]
),
semantic_search=SemanticSearch(
default_configuration_name="semantic_config",
configurations=[
SemanticConfiguration(
name="semantic_config",
prioritized_fields=SemanticPrioritizedFields(
content_fields=[
SemanticField(field_name="page_chunk")
]
)
)
]
)
)
index_client = SearchIndexClient(endpoint=endpoint, credential=credential)
index_client.create_or_update_index(index)
print(f"Index '{index_name}' created or updated successfully")
Lo schema dell'indice contiene campi per l'identificazione dei documenti e il contenuto della pagina, gli incorporamenti e i numeri. Include anche configurazioni per le query di classificazione semantica e vettoriali, che usano il text-embedding-3-large
modello distribuito in precedenza.
Caricare documenti nell'indice
Attualmente, l'indice earth_at_night
è vuoto. Eseguire il codice seguente per popolare l'indice con i documenti JSON dell'e-book Earth at Night della NASA. Come richiesto da Ricerca di intelligenza artificiale di Azure, ogni documento è conforme ai campi e ai tipi di dati definiti nello schema dell'indice.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
from azure.search.documents import SearchIndexingBufferedSender
import requests
url = "https://raw.githubusercontent.com/Azure-Samples/azure-search-sample-data/refs/heads/main/nasa-e-book/earth-at-night-json/documents.json"
documents = requests.get(url).json()
with SearchIndexingBufferedSender(endpoint=endpoint, index_name=index_name, credential=credential) as client:
client.upload_documents(documents=documents)
print(f"Documents uploaded to index '{index_name}'")
Creare un agente di conoscenza
Per connettere Azure AI Search alla distribuzione gpt-4.1-mini
e impostare come destinazione l'indice earth_at_night
in fase di query, è necessario un agente di conoscenza. Il codice seguente definisce un agente di knowledge base denominato earth-search-agent
, specificato usando la agent_name
variabile in una sezione precedente.
Per garantire risposte rilevanti e semanticamente significative, default_reranker_threshold
è impostata per escludere le risposte con un punteggio di reranker pari 2.5
o inferiore.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
from azure.search.documents.indexes.models import KnowledgeAgent, KnowledgeAgentAzureOpenAIModel, KnowledgeAgentTargetIndex, KnowledgeAgentRequestLimits, AzureOpenAIVectorizerParameters
agent = KnowledgeAgent(
name=agent_name,
models=[
KnowledgeAgentAzureOpenAIModel(
azure_open_ai_parameters=AzureOpenAIVectorizerParameters(
resource_url=azure_openai_endpoint,
deployment_name=azure_openai_gpt_deployment,
model_name=azure_openai_gpt_model
)
)
],
target_indexes=[
KnowledgeAgentTargetIndex(
index_name=index_name,
default_reranker_threshold=2.5
)
],
)
index_client.create_or_update_agent(agent)
print(f"Knowledge agent '{agent_name}' created or updated successfully")
Configurare i messaggi
Il passaggio successivo consiste nel definire le istruzioni dell'agente di conoscenza e il contesto di conversazione usando la matrice messages
. Ogni messaggio include un oggetto role
, ad esempio user
o assistant
, e content
in linguaggio naturale. Un messaggio utente rappresenta la query da elaborare, mentre un messaggio di assistente guida l'agente della knowledge base su come rispondere. Durante il processo di recupero, questi messaggi vengono inviati a un LLM per estrarre le risposte pertinenti dai documenti indicizzati.
Per il momento, crea il seguente messaggio di assistente, che indica earth-search-agent
di rispondere a domande sulla Terra di notte, citare fonti usando il loro ref_id
e rispondere con "Non so" quando le risposte non sono disponibili.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
instructions = """
An Q&A agent that can answer questions about the Earth at night.
Sources have a JSON format with a ref_id that must be cited in the answer.
If you do not have the answer, respond with "I don't know".
"""
messages = [
{
"role": "assistant",
"content": instructions
}
]
Eseguire la pipeline di recupero
Si è pronti per avviare la pipeline di recupero agentico. L'input per questa pipeline è la matrice messages
, la cui cronologia delle conversazioni include le istruzioni che hai fornito in precedenza e le query degli utenti. Inoltre, target_index_params
specifica l'indice per eseguire interrogazioni e altre configurazioni, come la soglia del ranker semantico.
Il codice seguente invia una query utente in due parti a earth-search-agent
, che decostruisce la query in sottoquery, esegue le sottoquery su entrambi i campi di testo e gli incorporamenti vettoriali nell'indice earth_at_night
e classifica e unisce i risultati. La risposta viene quindi aggiunta alla messages
matrice.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
from azure.search.documents.agent import KnowledgeAgentRetrievalClient
from azure.search.documents.agent.models import KnowledgeAgentRetrievalRequest, KnowledgeAgentMessage, KnowledgeAgentMessageTextContent, KnowledgeAgentIndexParams
agent_client = KnowledgeAgentRetrievalClient(endpoint=endpoint, agent_name=agent_name, credential=credential)
messages.append({
"role": "user",
"content": """
Why do suburban belts display larger December brightening than urban cores even though absolute light levels are higher downtown?
Why is the Phoenix nighttime street grid is so sharply visible from space, whereas large stretches of the interstate between midwestern cities remain comparatively dim?
"""
})
retrieval_result = agent_client.retrieve(
retrieval_request=KnowledgeAgentRetrievalRequest(
messages=[KnowledgeAgentMessage(role=msg["role"], content=[KnowledgeAgentMessageTextContent(text=msg["content"])]) for msg in messages if msg["role"] != "system"],
target_index_params=[KnowledgeAgentIndexParams(index_name=index_name, reranker_threshold=2.5)]
)
)
messages.append({
"role": "assistant",
"content": retrieval_result.response[0].content[0].text
})
Esaminare la risposta, l'attività e i risultati
Ora si vuole visualizzare la risposta, l'attività e i risultati della pipeline di recupero.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
import textwrap
import json
print("Response")
print(textwrap.fill(retrieval_result.response[0].content[0].text, width=120))
print("Activity")
print(json.dumps([a.as_dict() for a in retrieval_result.activity], indent=2))
print("Results")
print(json.dumps([r.as_dict() for r in retrieval_result.references], indent=2))
L'output dovrebbe essere simile all'esempio seguente, dove:
Response
fornisce una stringa di testo dei documenti più rilevanti (o blocchi) nell'indice di ricerca in base alla query dell'utente. Come illustrato più avanti in questa guida introduttiva, è possibile passare questa stringa a un LLM per la generazione di risposte.Activity
tiene traccia dei passaggi eseguiti durante il processo di recupero, incluse le sottoquery generate dallagpt-4.1-mini
distribuzione e i token usati per la pianificazione e l'esecuzione delle query.Results
elenca i documenti che hanno contribuito alla risposta, ognuno identificato dal relativodoc_key
.
Response
[{"ref_id":1,"content":"# Urban Structure\n\n## March 16, 2013\n\n### Phoenix Metropolitan Area at Night\n\nThis figure presents a nighttime satellite view of the Phoenix metropolitan area, highlighting urban structure and transport corridors. City lights illuminate the layout of several cities and major thoroughfares.\n\n**Labeled Urban Features:**\n\n- **Phoenix:** Central and brightest area in the right-center of the image.\n- **Glendale:** Located to the west of Phoenix, this city is also brightly lit.\n- **Peoria:** Further northwest, this area is labeled and its illuminated grid is seen.\n- **Grand Avenue:** Clearly visible as a diagonal, brightly lit thoroughfare running from Phoenix through Glendale and Peoria.\n- **Salt River Channel:** Identified in the southeast portion, running through illuminated sections.\n- **Phoenix Mountains:** Dark, undeveloped region to the northeast of Phoenix.\n- **Agricultural Fields:** Southwestern corner of the image, grid patterns are visible but with much less illumination, indicating agricultural land use.\n\n**Additional Notes:**\n\n- The overall pattern shows a grid-like urban development typical of western U.S. cities, with scattered bright nodes at major intersections or city centers.\n- There is a clear transition from dense urban development to sparsely populated or agricultural land, particularly evident towards the bottom and left of the image.\n- The illuminated areas follow the existing road and street grids, showcasing the extensive spread of the metropolitan area.\n\n**Figure Description:** \nA satellite nighttime image captured on March 16, 2013, showing Phoenix and surrounding areas (including Glendale and Peoria). Major landscape and infrastructural features, such as the Phoenix Mountains, Grand Avenue, the Salt River Channel, and agricultural fields, are labeled. The image reveals the extent of urbanization and the characteristic street grid illuminated by city lights.\n\n---\n\nPage 89"},{"ref_id":0,"content":"<!-- PageHeader=\"Urban Structure\" -->\n\n### Location of Phoenix, Arizona\n\nThe image depicts a globe highlighting the location of Phoenix, Arizona, in the southwestern United States, marked with a blue pinpoint on the map of North America. Phoenix is situated in the central part of Arizona, which is in the southwestern region of the United States.\n\n---\n\n### Grid of City Blocks-Phoenix, Arizona\n\nLike many large urban areas of the central and western United States, the Phoenix metropolitan area is laid out along a regular grid of city blocks and streets. While visible during the day, this grid is most evident at night, when the pattern of street lighting is clearly visible from the low-Earth-orbit vantage point of the ISS.\n\nThis astronaut photograph, taken on March 16, ... highlighted in this image is urbanized, there are several noticeably dark areas. The Phoenix Mountains are largely public parks and recreational land. To the west, agricultural fields provide a sharp contrast to the lit streets of residential developments. The Salt River channel appears as a dark ribbon within the urban grid.\n\n\n<!-- PageFooter=\"Earth at Night\" -->\n<!-- PageNumber=\"88\" -->"}]
Activity
[
{
"id": 0,
"type": "ModelQueryPlanning",
"input_tokens": 1407,
"output_tokens": 309
},
{
"id": 1,
"type": "AzureSearchQuery",
"target_index": "earth_at_night",
"query": {
"search": "suburban belts December brightening urban cores light levels"
},
"query_time": "2025-05-06T20:47:01.814Z",
"elapsed_ms": 714
},
{
"id": 2,
"type": "AzureSearchQuery",
"target_index": "earth_at_night",
"query": {
"search": "Phoenix nighttime street grid visibility from space"
},
"query_time": "2025-05-06T20:47:02.230Z",
"count": 2,
"elapsed_ms": 416
}
]
Results
[
{
"type": "AzureSearchDoc",
"id": "0",
"activity_source": 2,
"doc_key": "earth_at_night_508_page_104_verbalized"
},
{
"type": "AzureSearchDoc",
"id": "1",
"activity_source": 2,
"doc_key": "earth_at_night_508_page_105_verbalized"
}
]
Creare il client OpenAI di Azure
Per estendere la pipeline di recupero dall'estrazione di risposte alla generazione di risposte, configurare il client Azure OpenAI per interagire con la distribuzione gpt-4.1-mini
, che è stata specificata usando la variabile answer_model
in una sezione precedente.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
from openai import AzureOpenAI
from azure.identity import get_bearer_token_provider
azure_openai_token_provider = get_bearer_token_provider(credential, "https://cognitiveservices.azure.com/.default")
client = AzureOpenAI(
azure_endpoint=azure_openai_endpoint,
azure_ad_token_provider=azure_openai_token_provider,
api_version=azure_openai_api_version
)
Usare l'API Risposte per generare una risposta
È ora possibile usare l'API Risposte per generare una risposta dettagliata in base ai documenti indicizzati. Il codice seguente invia la messages
matrice, che contiene la cronologia delle conversazioni, alla gpt-4.1-mini
distribuzione.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
response = client.responses.create(
model=answer_model,
input=messages
)
wrapped = textwrap.fill(response.output_text, width=100)
print(wrapped)
L'output dovrebbe essere simile all'esempio seguente, che usa le funzionalità di ragionamento di gpt-4.1-mini
per fornire risposte contestualmente pertinenti.
Suburban belts often exhibit larger December brightening than urban cores primarily because of the type of development and light distribution in those areas. Suburbs tend to have more uniform and expansive lighting, making them more visible in nighttime satellite images. In contrast, urban cores, although having higher absolute light levels, often contain dense building clusters that can cause light to be obscured or concentrated in smaller areas, leading to less visible brightening when viewed from space. Regarding the visibility of the Phoenix nighttime street grid from space, it is attributed to the city's grid layout and the intensity of its street lighting. The grid pattern of the streets and the significant development around them create a stark contrast against less developed areas. Conversely, large stretches of interstate in the Midwest may remain dimmer due to fewer densely populated structures and less intensive street lighting, resulting in less illumination overall. For more detailed insights, you can refer to the sources: [0] and [1].
Usa l'API di completamento della chat per generare una risposta
In alternativa, è possibile usare l'API Completamento chat per la generazione di risposte.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
response = client.chat.completions.create(
model=answer_model,
messages=messages
)
wrapped = textwrap.fill(response.choices[0].message.content, width=100)
print(wrapped)
L'output dovrebbe essere simile all'esempio seguente.
Suburban belts tend to display larger December brightening than urban cores, despite the absolute light levels being higher in downtown areas, due to the differing density of light sources and how light scatters. In urban cores, the intense concentration of lights may result in a more uniform light distribution that can obscure the brightening effect, whereas suburban areas, with their lower density of lights and more open spaces, allow for clearer visibility of atmospheric light scattering, thus enhancing the brightening effect in those regions. As for why the Phoenix nighttime street grid is sharply visible from space compared to the dim stretches of the interstate between Midwestern cities, it primarily relates to urban planning and development patterns. The Phoenix metropolitan area is laid out along a regular grid of city blocks that include extensive street lighting, making the urban structure distinctly visible from space. In contrast, the interstates between Midwestern cities often traverse areas with less concentrated development and fewer bright lighting sources, leading to these sections appearing dimmer in nighttime imagery [1; ref_id:1].
Continuare la conversazione
Per continuare la conversazione, invia un'altra query utente a earth-search-agent
. Il codice seguente esegue nuovamente la pipeline di recupero, recuperando il contenuto pertinente dall'indice earth_at_night
e accodando la risposta alla messages
matrice. Tuttavia, a differenza di prima, è ora possibile usare il client OpenAI di Azure per generare una risposta in base al contenuto recuperato.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
messages.append({
"role": "user",
"content": "How do I find lava at night?"
})
retrieval_result = agent_client.retrieve(
retrieval_request=KnowledgeAgentRetrievalRequest(
messages=[KnowledgeAgentMessage(role=msg["role"], content=[KnowledgeAgentMessageTextContent(text=msg["content"])]) for msg in messages if msg["role"] != "system"],
target_index_params=[KnowledgeAgentIndexParams(index_name=index_name, reranker_threshold=2.5)]
)
)
messages.append({
"role": "assistant",
"content": retrieval_result.response[0].content[0].text
})
Esaminare la nuova risposta, l'attività e i risultati
Ora si vuole visualizzare la risposta, l'attività e i risultati della pipeline di recupero.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
import textwrap
import json
print("Response")
print(textwrap.fill(retrieval_result.response[0].content[0].text, width=120))
print("Activity")
print(json.dumps([a.as_dict() for a in retrieval_result.activity], indent=2))
print("Results")
print(json.dumps([r.as_dict() for r in retrieval_result.references], indent=2))
Generare una risposta basata su LLM
Ora che sono state inviate più query utente, usare l'API Risposte per generare una risposta in base ai documenti indicizzati e alla cronologia delle conversazioni, acquisita nella matrice messages
.
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
response = client.responses.create(
model=answer_model,
input=messages
)
wrapped = textwrap.fill(response.output_text, width=100)
print(wrapped)
L'output dovrebbe essere simile all'esempio seguente.
To find lava at night, you can look for the following signs: 1. **Active Volcanoes**: Research volcanoes that are currently active. Notable examples include Mount Etna in Italy and Kilauea in Hawaii. Both have had significant eruptions that can be observed at night due to the glow of lava. 2. **Satellite Imagery**: Use satellite imagery, especially those from sources like VIIRS (Visible Infrared Imaging Radiometer Suite) on the Suomi NPP satellite, which captures nighttime images of active lava flows. During eruptions, lava glows brightly in thermal infrared images, making it detectable from space. 3. **Safe Viewing Locations**: If you’re near an active volcano, find designated viewing areas for safety. Many national parks with volcanoes offer nighttime lava viewing experiences. 4. **Moonlight**: The presence of moonlight can enhance visibility, allowing you to spot lava flows more easily against the backdrop of the dark landscape. 5. **Monitoring Reports**: Follow updates from geological services or local authorities that monitor volcanic activity, which often provide real-time information about eruptions and visible lava flows at night. 6. **Photography**: If you're an enthusiast, consider using long-exposure photography techniques to capture the glow of lava flows at night. For more information on observing volcanic activity, satellite imagery can provide vital data for detecting lava flows and volcanic eruptions.
Pulire le risorse
Quando si lavora nel proprio abbonamento, è consigliabile completare un progetto determinando se sono ancora necessarie le risorse create. Le risorse lasciate in esecuzione possono avere un costo. È possibile eliminare le risorse singolarmente oppure eliminare il gruppo di risorse per eliminare l'intero set di risorse.
Nel portale di Azure è possibile trovare e gestire le risorse selezionando Tutte le risorse o Gruppi di risorse nel riquadro sinistro. È anche possibile eseguire il codice seguente per eliminare gli oggetti creati in questa guida introduttiva.
Eliminare l'agente di conoscenza
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
index_client = SearchIndexClient(endpoint=endpoint, credential=credential)
index_client.delete_agent(agent_name)
print(f"Knowledge agent '{agent_name}' deleted successfully")
Eliminare l'indice di ricerca
Aggiungere ed eseguire una nuova cella di codice nel quickstart-agentic-retrieval.ipynb
notebook con il codice seguente:
index_client = SearchIndexClient(endpoint=endpoint, credential=credential)
index_client.delete_index(index_name)
print(f"Index '{index_name}' deleted successfully")
Annotazioni
Questa funzionalità è attualmente disponibile in anteprima pubblica. Questa anteprima viene fornita senza un contratto di servizio e non è consigliata per i carichi di lavoro di produzione. Alcune funzionalità potrebbero non essere supportate o potrebbero presentare funzionalità limitate. Per altre informazioni, vedere le Condizioni supplementari per l'uso delle anteprime di Microsoft Azure.
In questa guida introduttiva, viene utilizzato il recupero agentico per creare un'esperienza di ricerca conversazionale basata su modelli di linguaggio di grandi dimensioni e sui tuoi dati proprietari. Il recupero agentico suddivide le query utente complesse in sottoquery, esegue le sottoquery in parallelo ed estrae i dati di base dai documenti indicizzati in Ricerca di intelligenza artificiale di Azure. L'output è destinato all'integrazione con soluzioni di chat personalizzate.
Anche se è possibile fornire dati personalizzati, questo argomento di avvio rapido usa documenti JSON di esempio dell'e-book Earth at Night della NASA. I documenti descrivono argomenti scientifici generali e immagini della Terra di notte come osservato dallo spazio.
Suggerimento
La versione REST di questa guida introduttiva introduce il recupero agentico nella Ricerca AI di Azure, che estrae le risposte anziché generarle. Per un flusso di lavoro end-to-end, inclusi i passaggi per l'aggiunta di turni di conversazione e il passaggio del contenuto recuperato a un LLM per la generazione di risposte, vedere la versione C# o Python.
Prerequisiti
Un account Azure con una sottoscrizione attiva. Creare un account gratuito.
Un servizio ricerca di intelligenza artificiale di Azure sul livello Basic o superiore con semantic ranker abilitato.
Progetto Azure AI Foundry. Si ottiene una risorsa di Azure AI Foundry (necessaria per le distribuzioni di modelli) quando si crea un progetto Azure AI Foundry.
Visual Studio Code con un client REST.
Interfaccia della riga di comando di Azure per l'autenticazione senza chiave con MICROSOFT Entra ID.
Configurare l'accesso in base al ruolo
È possibile usare le chiavi API del servizio di ricerca o Microsoft Entra ID con assegnazioni di ruolo. Le chiavi sono più facili da iniziare, ma i ruoli sono più sicuri.
Per configurare l'accesso basato sui ruoli consigliato:
Accedi al portale di Azure.
Abilitare l'accesso basato sui ruoli nel servizio Ricerca intelligenza artificiale di Azure.
Nel servizio Ricerca intelligenza artificiale di Azure assegnare a se stessi i ruoli seguenti .
Collaboratore servizi di ricerca
Collaboratore ai dati dell'indice di ricerca
Lettore di dati dell'indice di ricerca
Per il recupero agentico, Azure AI Search deve anche accedere alla risorsa Fonderia di Azure OpenAI.
Creare un'identità gestita assegnata dal sistema nel servizio Ricerca intelligenza artificiale di Azure. Ecco come eseguire questa operazione usando l'interfaccia della riga di comando di Azure:
az search service update --name YOUR-SEARCH-SERVICE-NAME --resource-group YOUR-RESOURCE-GROUP-NAME --identity-type SystemAssigned
Se si dispone già di un'identità gestita, è possibile ignorare questo passaggio.
Nella risorsa Azure AI Foundry, assegnare Utente dei Servizi cognitivi all'identità gestita che hai creato per il servizio di ricerca.
Distribuire modelli
Per usare il recupero agentico, è necessario distribuire uno dei modelli OpenAI di Azure supportati nella risorsa Azure AI Foundry:
Modello di chat per la pianificazione delle query e la generazione di risposte. In questo avvio rapido usiamo
gpt-4.1-mini
. Facoltativamente, è possibile usare un modello diverso per la pianificazione delle query e un altro per la generazione di risposte, ma questa guida introduttiva usa lo stesso modello per semplicità.Modello di incorporamento per le query vettoriali. In questo avvio rapido usiamo
text-embedding-3-large
, ma puoi usare qualsiasi modello di incorporamento che supporta l'attivitàtext-embedding
.
Per distribuire i modelli OpenAI di Azure:
Accedere al portale di Azure AI Foundry e selezionare la risorsa Azure AI Foundry.
Nel riquadro sinistro selezionare Catalogo modelli.
Selezionare gpt-4.1-mini e quindi selezionare Usa questo modello.
Specificare un nome di distribuzione. Per semplificare il codice, è consigliabile usare gpt-4.1-mini.
Lasciare le impostazioni predefinite.
Seleziona Distribuisci.
Ripeti i passaggi precedenti, ma questa volta utilizza il modello di embedding text-embedding-3-large.
Ottenere gli endpoint
Nel codice specificare gli endpoint seguenti per stabilire connessioni con il servizio Ricerca intelligenza artificiale di Azure e la risorsa Azure AI Foundry. Questi passaggi presuppongono che l'accesso basato sui ruoli sia stato configurato come descritto in precedenza.
Per ottenere gli endpoint di servizio:
Accedi al portale di Azure.
Nel servizio Ricerca intelligenza artificiale di Azure:
Nel riquadro sinistro selezionare Panoramica.
Copiare l'URL, che dovrebbe essere simile a
https://my-service.search.windows.net
.
Nella risorsa Azure AI Foundry:
Nel riquadro sinistro, selezionare Gestione risorse>Chiavi ed endpoint.
Selezionare la scheda OpenAI e copiare l'URL simile a
https://my-resource.openai.azure.com
.
Importante
Il recupero agentico ha due modelli di fatturazione basati su token:
- Fatturazione da Azure OpenAI per la pianificazione delle query.
- Fatturazione per l'esecuzione di query con Azure AI Search (classificazione semantica).
La classificazione semantica è gratuita nell'anteprima pubblica iniziale. Dopo l'anteprima, viene applicata la fatturazione standard dei token. Per altre informazioni, vedere Disponibilità e prezzi del recupero agentico.
Connettersi dal sistema locale
L'accesso basato sui ruoli è stato configurato per interagire con Ricerca di intelligenza artificiale di Azure e Azure OpenAI. Dalla riga di comando usare l'interfaccia della riga di comando di Azure per accedere alla stessa sottoscrizione e allo stesso tenant per entrambi i servizi. Per altre informazioni, vedere Avvio rapido: Connettersi senza chiavi.
Per connettersi dal sistema locale:
Aprire un nuovo terminale in Visual Studio Code e passare alla directory in cui salvare i file.
Eseguire il comando seguente e accedere con l'account Azure. Se si hanno più sottoscrizioni, selezionare quella che contiene il servizio Ricerca intelligenza artificiale di Azure e il progetto Azure AI Foundry.
az login
Per ottenere il token Microsoft Entra, eseguire il comando seguente. Questo valore viene specificato nella sezione successiva.
az account get-access-token --scope https://search.azure.com/.default --query accessToken --output tsv
Caricare le connessioni
Prima di inviare richieste, definire credenziali, endpoint e dettagli di distribuzione per le connessioni a Ricerca di intelligenza artificiale di Azure e Azure OpenAI. Questi valori vengono usati nelle operazioni successive.
Per caricare le connessioni:
In Visual Studio Code, crea un file
.rest
o.http
. Ad esempio, è possibile denominare il fileagentic-retrieval.rest
.Incollare questi segnaposto nel nuovo file:
@baseUrl = PUT-YOUR-SEARCH-SERVICE-URL-HERE @token = PUT-YOUR-MICROSOFT-ENTRA-TOKEN-HERE @aoaiBaseUrl = PUT-YOUR-AI-FOUNDRY-URL-HERE @aoaiGptModel = gpt-4.1-mini @aoaiGptDeployment = gpt-4.1-mini @aoaiEmbeddingModel = text-embedding-3-large @aoaiEmbeddingDeployment = text-embedding-3-large @index-name = earth_at_night @agent-name = earth-search-agent @api-version = 2025-05-01-Preview
Imposta
@baseUrl
sul tuo endpoint di Ricerca AI di Azure, che appare simile ahttps://<your-search-service-name>.search.windows.net.
. Imposta@aoaiBaseUrl
sul tuo endpoint di Azure AI Foundry, che appare simile ahttps://<your-foundry-resource-name>.openai.azure.com.
. Hai ottenuto entrambi i valori nella sezione Ottenere gli endpoint.Sostituire
@token
con il token Microsoft Entra ottenuto nella sezione Connect dal sistema locale.Nello stesso file immettere e inviare la richiesta HTTP seguente per verificare che sia possibile connettersi a Ricerca intelligenza artificiale di Azure. La richiesta elenca gli indici esistenti nel servizio di ricerca.
### List existing indexes by name GET {{baseUrl}}/indexes?api-version={{api-version}} HTTP/1.1 Content-Type: application/json Authorization: Bearer {{token}}
Una risposta dovrebbe essere visualizzata in un riquadro adiacente. Se sono presenti indici esistenti, vengono elencati. In caso contrario, l'elenco è vuoto. Se il codice HTTP è
200 OK
, si è pronti per procedere.
Creare un indice di ricerca
In Ricerca di intelligenza artificiale di Azure un indice è una raccolta strutturata di dati. Usare Create Index per definire un indice denominato earth_at_night
, specificato usando la @index-name
variabile nella sezione precedente.
### Create an index
PUT {{baseUrl}}/indexes/{{index-name}}?api-version={{api-version}} HTTP/1.1
Content-Type: application/json
Authorization: Bearer {{token}}
{
"name": "{{index-name}}",
"fields": [
{
"name": "id",
"type": "Edm.String",
"key": true
},
{
"name": "page_chunk",
"type": "Edm.String",
"searchable": true
},
{
"name": "page_embedding_text_3_large",
"type": "Collection(Edm.Single)",
"stored": false,
"dimensions": 3072,
"vectorSearchProfile": "hnsw_text_3_large"
},
{
"name": "page_number",
"type": "Edm.Int32",
"filterable": true
}
],
"semantic": {
"defaultConfiguration": "semantic_config",
"configurations": [
{
"name": "semantic_config",
"prioritizedFields": {
"prioritizedContentFields": [
{
"fieldName": "page_chunk"
}
]
}
}
]
},
"vectorSearch": {
"profiles": [
{
"name": "hnsw_text_3_large",
"algorithm": "alg",
"vectorizer": "azure_openai_text_3_large"
}
],
"algorithms": [
{
"name": "alg",
"kind": "hnsw"
}
],
"vectorizers": [
{
"name": "azure_openai_text_3_large",
"kind": "azureOpenAI",
"azureOpenAIParameters": {
"resourceUri": "{{aoaiBaseUrl}}",
"deploymentId": "{{aoaiEmbeddingDeployment}}",
"modelName": "{{aoaiEmbeddingModel}}"
}
}
]
}
}
Lo schema dell'indice contiene campi per l'identificazione dei documenti e il contenuto della pagina, gli incorporamenti e i numeri. Include anche configurazioni per le query di classificazione semantica e vettoriali, che usano il text-embedding-3-large
modello distribuito in precedenza.
Caricare documenti nell'indice
Attualmente, l'indice earth_at_night
è vuoto. Usare Index Documents per popolare l'indice con i documenti JSON dell'e-book Earth at Night della NASA. Come richiesto da Ricerca di intelligenza artificiale di Azure, ogni documento è conforme ai campi e ai tipi di dati definiti nello schema dell'indice.
### Load documents
POST {{baseUrl}}/indexes/{{index-name}}/docs/index?api-version={{api-version}} HTTP/1.1
Content-Type: application/json
Authorization: Bearer {{token}}
{
"value": [
{
"@search.action": "upload",
"id": "earth_at_night_508_page_104_verbalized",
"page_chunk": "<!-- PageHeader=\"Urban Structure\" -->\n\n### Location of Phoenix, Arizona\n\nThe image depicts a globe highlighting the location of Phoenix, Arizona, in the southwestern United States, marked with a blue pinpoint on the map of North America. Phoenix is situated in the central part of Arizona, which is in the southwestern region of the United States.\n\n---\n\n### Grid of City Blocks-Phoenix, Arizona\n\nLike many large urban areas of the central and western United States, the Phoenix metropolitan area is laid out along a regular grid of city blocks and streets. While visible during the day, this grid is most evident at night, when the pattern of street lighting is clearly visible from the low-Earth-orbit vantage point of the ISS.\n\nThis astronaut photograph, taken on March 16, 2013, includes parts of several cities in the metropolitan area, including Phoenix (image right), Glendale (center), and Peoria (left). While the major street grid is oriented north-south, the northwest-southeast oriented Grand Avenue cuts across the three cities at image center. Grand Avenue is a major transportation corridor through the western metropolitan area; the lighting patterns of large industrial and commercial properties are visible along its length. Other brightly lit properties include large shopping centers, strip malls, and gas stations, which tend to be located at the intersections of north-south and east-west trending streets.\n\nThe urban grid encourages growth outwards along a city's borders by providing optimal access to new real estate. Fueled by the adoption of widespread personal automobile use during the twentieth century, the Phoenix metropolitan area today includes 25 other municipalities (many of them largely suburban and residential) linked by a network of surface streets and freeways.\n\nWhile much of the land area highlighted in this image is urbanized, there are several noticeably dark areas. The Phoenix Mountains are largely public parks and recreational land. To the west, agricultural fields provide a sharp contrast to the lit streets of residential developments. The Salt River channel appears as a dark ribbon within the urban grid.\n\n\n<!-- PageFooter=\"Earth at Night\" -->\n<!-- PageNumber=\"88\" -->",
"page_embedding_text_3_large": [
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"page_chunk": "# Urban Structure\n\n## March 16, 2013\n\n### Phoenix Metropolitan Area at Night\n\nThis figure presents a nighttime satellite view of the Phoenix metropolitan area, highlighting urban structure and transport corridors. City lights illuminate the layout of several cities and major thoroughfares.\n\n**Labeled Urban Features:**\n\n- **Phoenix:** Central and brightest area in the right-center of the image.\n- **Glendale:** Located to the west of Phoenix, this city is also brightly lit.\n- **Peoria:** Further northwest, this area is labeled and its illuminated grid is seen.\n- **Grand Avenue:** Clearly visible as a diagonal, brightly lit thoroughfare running from Phoenix through Glendale and Peoria.\n- **Salt River Channel:** Identified in the southeast portion, running through illuminated sections.\n- **Phoenix Mountains:** Dark, undeveloped region to the northeast of Phoenix.\n- **Agricultural Fields:** Southwestern corner of the image, grid patterns are visible but with much less illumination, indicating agricultural land use.\n\n**Additional Notes:**\n\n- The overall pattern shows a grid-like urban development typical of western U.S. cities, with scattered bright nodes at major intersections or city centers.\n- There is a clear transition from dense urban development to sparsely populated or agricultural land, particularly evident towards the bottom and left of the image.\n- The illuminated areas follow the existing road and street grids, showcasing the extensive spread of the metropolitan area.\n\n**Figure Description:** \nA satellite nighttime image captured on March 16, 2013, showing Phoenix and surrounding areas (including Glendale and Peoria). Major landscape and infrastructural features, such as the Phoenix Mountains, Grand Avenue, the Salt River Channel, and agricultural fields, are labeled. The image reveals the extent of urbanization and the characteristic street grid illuminated by city lights.\n\n---\n\nPage 89",
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],
"page_number": 105
}
]
}
Creare un agente di conoscenza
Per connettere Azure AI Search alla distribuzione gpt-4.1-mini
e impostare come destinazione l'indice earth_at_night
in fase di query, è necessario un agente di conoscenza. Usare Create Knowledge Agents per definire un agente denominato earth-search-agent
, specificato usando la @agent-name
variabile in una sezione precedente.
Per garantire risposte rilevanti e semanticamente significative, defaultRerankerThreshold
è impostata per escludere le risposte con un punteggio di reranker pari 2.5
o inferiore.
### Create an agent
PUT {{baseUrl}}/agents/{{agent-name}}?api-version={{api-version}} HTTP/1.1
Content-Type: application/json
Authorization: Bearer {{token}}
{
"name": "{{agent-name}}",
"targetIndexes": [
{
"indexName": "{{index-name}}",
"defaultRerankerThreshold": 2.5
}
],
"models": [
{
"kind": "azureOpenAI",
"azureOpenAIParameters": {
"resourceUri": "{{aoaiBaseUrl}}",
"deploymentId": "{{aoaiGptDeployment}}",
"modelName": "{{aoaiGptModel}}"
}
}
]
}
Eseguire la pipeline di recupero
Si è pronti per avviare la pipeline di recupero agentico. Usare Recupero della Conoscenza - Recupera per inviare una query utente in due parti a earth-search-agent
, che decostruisce la query in sottoquery, esegue le sottoquery sui campi di testo e sugli embedding vettoriali nell'indice earth_at_night
, e classifica e unisce i risultati.
### Run agentic retrieval
POST {{baseUrl}}/agents/{{agent-name}}/retrieve?api-version={{api-version}} HTTP/1.1
Content-Type: application/json
Authorization: Bearer {{token}}
{
"messages": [
{
"role": "user",
"content": [
{
"type": "text",
"text": "Why do suburban belts display larger December brightening than urban cores even though absolute light levels are higher downtown? Why is the Phoenix nighttime street grid is so sharply visible from space, whereas large stretches of the interstate between midwestern cities remain comparatively dim?"
}
]
}
],
"targetIndexParams": [
{
"indexName": "{{index-name}}",
"rerankerThreshold": 2.5
}
]
}
L'output dovrebbe essere simile al codice JSON seguente, dove:
response
fornisce una stringa di testo dei documenti più rilevanti (o blocchi) nell'indice di ricerca in base alla query dell'utente. È possibile passare questa stringa a un LLM da usare come dati di base nella generazione di risposte.activity
tiene traccia dei passaggi eseguiti durante il processo di recupero, incluse le sottoquery generate dallagpt-4.1-mini
distribuzione e i token usati per la pianificazione e l'esecuzione delle query.references
elenca i documenti che hanno contribuito alla risposta, ognuno identificato dal relativodocKey
.
{
"response": [
{
"role": "assistant",
"content": [
{
"type": "text",
"text": "[{\"ref_id\":1,\"content\":\"# Urban Structure\\n\\n## March 16, 2013\\n\\n### Phoenix Metropolitan Area at Night\\n\\nThis figure presents a nighttime satellite view of the Phoenix metropolitan area, highlighting urban structure and transport corridors. City lights illuminate the layout of several cities and major thoroughfares.\\n\\n**Labeled Urban Features:**\\n\\n- **Phoenix:** Central and brightest area in the right-center of the image.\\n- **Glendale:** Located to the west of Phoenix, this city is also brightly lit.\\n- **Peoria:** Further northwest, this area is labeled and its illuminated grid is seen.\\n- **Grand Avenue:** Clearly visible as a diagonal, brightly lit thoroughfare running from Phoenix through Glendale and Peoria.\\n- **Salt River Channel:** Identified in the southeast portion, running through illuminated sections.\\n- **Phoenix Mountains:** Dark, undeveloped region to the northeast of Phoenix.\\n- **Agricultural Fields:** Southwestern corner of the image, grid patterns are visible but with much less illumination, indicating agricultural land use.\\n\\n**Additional Notes:**\\n\\n- The overall pattern shows a grid-like urban development typical of western U.S. cities, with scattered bright nodes at major intersections or city centers.\\n- There is a clear transition from dense urban development to sparsely populated or agricultural land, particularly evident towards the bottom and left of the image.\\n- The illuminated areas follow the existing road and street grids, showcasing the extensive spread of the metropolitan area.\\n\\n**Figure Description:** \\nA satellite nighttime image captured on March 16, 2013, showing Phoenix and surrounding areas (including Glendale and Peoria). Major landscape and infrastructural features, such as the Phoenix Mountains, Grand Avenue, the Salt River Channel, and agricultural fields, are labeled. The image reveals the extent of urbanization and the characteristic street grid illuminated by city lights.\\n\\n---\\n\\nPage 89\"},{\"ref_id\":0,\"content\":\"<!-- PageHeader=\\\"Urban Structure\\\" -->\\n\\n### Location of Phoenix, Arizona\\n\\nThe image depicts a globe highlighting the location of Phoenix, Arizona, in the southwestern United States, marked with a blue pinpoint on the map of North America. Phoenix is situated in the central part of Arizona, which is in the southwestern region of the United States.\\n\\n---\\n\\n### Grid of City Blocks-Phoenix, Arizona\\n\\nLike many large urban areas of the central and western United States, the Phoenix metropolitan area is laid out along a regular grid of city blocks and streets. While visible during the day, this grid is most evident at night, when the pattern of street lighting is clearly visible from the low-Earth-orbit vantage point of the ISS.\\n\\nThis astronaut photograph, taken on March 16, 2013, includes parts of several cities in the metropolitan area, including Phoenix (image right), Glendale (center), and Peoria (left). While the major street grid is oriented north-south, the northwest-southeast oriented Grand Avenue cuts across the three cities at image center. Grand Avenue is a major transportation corridor through the western metropolitan area; the lighting patterns of large industrial and commercial properties are visible along its length. Other brightly lit properties include large shopping centers, strip malls, and gas stations, which tend to be located at the intersections of north-south and east-west trending streets.\\n\\nThe urban grid encourages growth outwards along a city's borders by providing optimal access to new real estate. Fueled by the adoption of widespread personal automobile use during the twentieth century, the Phoenix metropolitan area today includes 25 other municipalities (many of them largely suburban and residential) linked by a network of surface streets and freeways.\\n\\nWhile much of the land area highlighted in this image is urbanized, there are several noticeably dark areas. The Phoenix Mountains are largely public parks and recreational land. To the west, agricultural fields provide a sharp contrast to the lit streets of residential developments. The Salt River channel appears as a dark ribbon within the urban grid.\\n\\n\\n<!-- PageFooter=\\\"Earth at Night\\\" -->\\n<!-- PageNumber=\\\"88\\\" -->\"}]",
"image": null
}
]
}
],
"activity": [
{
"type": "ModelQueryPlanning",
"id": 0,
"inputTokens": 1355,
"outputTokens": 423
},
{
"type": "AzureSearchQuery",
"id": 1,
"targetIndex": "earth_at_night",
"query": {
"search": "suburban belts December brightening urban cores comparison",
"filter": null
},
"queryTime": "2025-05-06T15:57:14.666Z",
"elapsedMs": 270
},
{
"type": "AzureSearchQuery",
"id": 2,
"targetIndex": "earth_at_night",
"query": {
"search": "Phoenix nighttime street grid visibility from space",
"filter": null
},
"queryTime": "2025-05-06T15:57:14.858Z",
"count": 2,
"elapsedMs": 192
},
{
"type": "AzureSearchQuery",
"id": 3,
"targetIndex": "earth_at_night",
"query": {
"search": "interstate visibility from space midwestern cities",
"filter": null
},
"queryTime": "2025-05-06T15:57:15.026Z",
"count": 1,
"elapsedMs": 167
}
],
"references": [
{
"type": "AzureSearchDoc",
"id": "0",
"activitySource": 2,
"docKey": "earth_at_night_508_page_104_verbalized",
"sourceData": null
},
{
"type": "AzureSearchDoc",
"id": "1",
"activitySource": 2,
"docKey": "earth_at_night_508_page_105_verbalized",
"sourceData": null
}
]
}
Pulire le risorse
Quando si lavora nel proprio abbonamento, è consigliabile completare un progetto determinando se sono ancora necessarie le risorse create. Le risorse lasciate in esecuzione possono avere un costo. È possibile eliminare le risorse singolarmente oppure eliminare il gruppo di risorse per eliminare l'intero set di risorse.
Nel portale di Azure è possibile trovare e gestire le risorse selezionando Tutte le risorse o Gruppi di risorse nel riquadro sinistro. È anche possibile eseguire il codice seguente per eliminare gli oggetti creati in questa guida introduttiva.
Eliminare l'agente di conoscenza
### Delete the agent
DELETE {{baseUrl}}/agents/{{agent-name}}?api-version={{api-version}}
Content-Type: application/json
Authorization: Bearer {{token}}
Eliminare l'indice di ricerca
### Delete the index
DELETE {{baseUrl}}/indexes/{{index-name}}?api-version={{api-version}}
Content-Type: application/json
Authorization: Bearer {{token}}