STPolyFromText (geography Data Type)
Returns a geography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database.
The following example uses STPolyFromText() to create a geography instance.
DECLARE @g geography; SET @g = geography::STPolyFromText('POLYGON((-122.358 47.653, -122.348 47.649, -122.348 47.658, -122.358 47.658, -122.358 47.653))', 4326); SELECT @g.ToString();