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SqlGeography.STDistance Method (SqlGeography)


Applies To: SQL Server 2016 Preview

Returns the shortest distance between a point in a SqlGeography instance and a point in another SqlGeography instance.

Namespace:   Microsoft.SqlServer.Types
Assembly:  Microsoft.SqlServer.Types (in Microsoft.SqlServer.Types.dll)

[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public SqlDouble STDistance(
	SqlGeography other


Type: Microsoft.SqlServer.Types.SqlGeography

Is another geography instance from which to measure the distance between the instance on which STDistance is invoked. If an empty set is specified, STDistance will return null.

Return Value

Type: System.Data.SqlTypes.SqlDouble

Returns null if the spatial reference IDs (SRIDs) of the SqlGeography instances do not match.

If this method is used to determine distance between antipodal points, or consecutive points on opposite sides of the globe, as in the distance between POINT (0 0) and POINT (180 0), this method will return null.

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