PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual206 / 310The allowable DE-9IM Intersection Matrices for the two geometries are:• FT*******• F**T*****• F***T****ImportantDo not call with a GEOMETRYCOLLECTION as an argumentNoteThis function call will automatically include a bounding box comparison that will make use of any indexes that areavailable on the geometries. To avoid using an index, use _ST_Touches instead.This method implements the OpenGIS Simple Features Implementation Specification for SQL 1.1. s2.1.1.2 // s2.1.13.3This method implements the SQL/MM specification. SQL-MM 3: 5.1.28ExamplesThe ST_Touches predicate returns TRUE in all the following illustrations.POLYGON / POLYGON POLYGON / POLYGON POLYGON / LINESTRING