STPolyFromWKB (geography Data Type)
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
SQL database in Microsoft Fabric
Returns a geographyPolygon instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
Syntax
STPolyFromWKB ( 'WKB_polygon' , SRID )
Arguments
WKB_polygon
Is the WKB representation of the geographyPolygon instance you wish to return. WKB_polygon is a varbinary(max) expression.
SRID
Is an int expression representing the spatial reference ID (SRID) of the geographyPolygon instance you wish to return.
Return Types
SQL Server return type: geography
CLR return type: SqlGeography
OGC type: Polygon
Remarks
This method throws a FormatException if the input is not well-formatted.
Examples
The following example uses STPolyFromWKB() to create a geography instance.
DECLARE @g geography;
SET @g = geography::STPolyFromWKB(0x01030000000100000005000000F4FDD478E9965EC0DD24068195D3474083C0CAA145965EC0508D976E12D3474083C0CAA145965EC04E62105839D44740F4FDD478E9965EC04E62105839D44740F4FDD478E9965EC0DD24068195D34740, 4326);
SELECT @g.ToString();