GeocoordinateSatelliteData.GeometricDilutionOfPrecision Property

public:
 property IReference<double> ^ GeometricDilutionOfPrecision { IReference<double> ^ get(); };

IReference<double> GeometricDilutionOfPrecision();

public System.Nullable<double> GeometricDilutionOfPrecision { get; }

var iReference = geocoordinateSatelliteData.geometricDilutionOfPrecision;

Public ReadOnly Property GeometricDilutionOfPrecision As Nullable(Of Double)

Property Value

The geometric dilution of precision (GDOP) value, or null if the GNSS receiver returns zero for this measurement.

Windows requirements

Remarks

Geometric dilution of precision (GDOP) indicates the overall satellite geometry quality for position determination. GDOP combines the effects of satellite positioning on horizontal, vertical, and time accuracy into a single metric that reflects positioning confidence.

GDOP is a unitless multiplier; the approximate position error equals the GDOP value multiplied by the underlying range error from satellite measurements. For interpretation ranges and contributing factors (satellite geometry, satellite count and distribution, elevation, constellation changes), consult standard GNSS references. This API exposes the raw value so applications can apply scenario-appropriate thresholds without duplicating broadly available GNSS domain material.

Application guidance

• Critical applications (navigation, emergency services) should prefer lower GDOP values when selecting a position fix.
• Multiple readings can help validate positions when GDOP values are elevated or fluctuating.
• Monitor GDOP trends - rapidly changing values may indicate unstable satellite geometry and justify discarding a fix.

See also

• GeocoordinateSatelliteData
• PositionDilutionOfPrecision
• TimeDilutionOfPrecision