ST_MyMethod Returns something useful boolean ST_MyMethod geometry g1 geometry g2 boolean ST_MyMethod geometry g1 geometry g2 varchar myparam Some useful description here. This function call will automatically include a bounding box comparison that will make use of any indexes that are available on the geometries. Availability: version goes here - requires GEOS >= 2.1.0. This method implements the OpenGIS Simple Features Implementation Specification for SQL. This method implements the SQL/MM specification: SQL-MM 3: 5.1.23 This function supports 3d and will not drop the z-index. This method supports Circular Strings and Curves , ...