EnvelopeAngle (geography Data Type)
Returns the maximum angle between the point returned by
EnvelopeCenter() and a point in the geography instance in degrees.
This geography data type method supports FullGlobe instances or spatial instances that are larger than a hemisphere.
SQL Server return type: float
CLR return type: SqlDouble
This method returns a point in the geography instance in degrees. When used with EnvelopeCenter(),
EnvelopeAngle() returns a bounding circle of a geography instance.
In SQL Server 2012, this method has been extended to FullGlobe instances.
The hemisphere limitation applied to
EnvelopeAngle() in SQL Server 2008 has been removed. However, for instances with angles greater than 90 degrees, 180 degrees will be returned.
EnvelopeAngle() is not precise for geography instances that span more than one hemisphere.
DECLARE @g geography = 'LINESTRING(-120 45, -120 0, -90 0)'; SELECT @g.EnvelopeAngle();