/// <summary>
/// Converts a native Sql Server geography to GeoJSON geometry
/// </summary>
/// <param name="sqlGeography">SQL Server geography to convert</param>
/// <returns>GeoJSON geometry</returns>
public static IGeometryObject ToGeoJSONGeometry(this SqlGeography sqlGeography)
{
if (sqlGeography == null || sqlGeography.IsNull)
{
return(null);
}
// Make valid if necessary
sqlGeography = sqlGeography.MakeValidIfInvalid();
if (sqlGeography.STIsValid().IsFalse)
{
throw new Exception("Invalid geometry : " + sqlGeography.IsValidDetailed());
}
// Conversion using geography sink
SqlGeographyGeoJsonSink sink = new SqlGeographyGeoJsonSink();
sqlGeography.Populate(sink);
return(sink.ConstructedGeography);
}
/// <summary>
/// Converts a native Sql Server geography to GeoJSON geometry
/// </summary>
/// <param name="sqlGeography">SQL Server geography to convert</param>
/// <param name="withBoundingBox">Value indicating whether the feature's BoundingBox should be set.</param>
/// <returns>GeoJSON geometry</returns>
public static T ToGeoJSONObject <T>(this SqlGeography sqlGeography, bool withBoundingBox = true) where T : GeoJSONObject
{
if (sqlGeography == null || sqlGeography.IsNull)
{
return(null);
}
// Make valid if necessary
sqlGeography = sqlGeography.MakeValidIfInvalid();
if (sqlGeography.STIsValid().IsFalse)
{
throw new Exception("Invalid geometry : " + sqlGeography.IsValidDetailed());
}
// Conversion using geography sink
T geoJSONobj = null;
SqlGeographyGeoJsonSink sink = new SqlGeographyGeoJsonSink();
sqlGeography.Populate(sink);
geoJSONobj = sink.ConstructedGeography as T;
geoJSONobj.BoundingBoxes = withBoundingBox ? sink.BoundingBox : null;
return(geoJSONobj);
}
