STPointFromWKB (geometry Data Type)
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
SQL database in Microsoft Fabric
Returns a geometryPoint instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
Syntax
STPointFromWKB ( 'WKB_point' , SRID )
Arguments
WKB_point
Is the WKB representation of the geometryPoint instance you wish to return. WKB_point is a varbinary(max) expression.
SRID
Is an int expression representing the spatial reference ID (SRID) of the geometryPoint instance you wish to return.
Return Types
SQL Server return type: geometry
CLR return type: SqlGeometry
OGC type: Point
Remarks
This method will throw a FormatException if the input is not well-formatted.
Examples
The following example uses STPointFromWKB() to create a geometry instance.
DECLARE @g geometry;
SET @g = geometry::STPointFromWKB(0x010100000000000000000059400000000000005940, 0);
SELECT @g.STAsText();