PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual188 / 310ImportantThis function will return false if either geometry is invalid even if they are binary equal.This method implements the OpenGIS Simple Features Implementation Specification for SQL 1.1. s2.1.1.2This method implements the SQL/MM specification. SQL-MM 3: 5.1.24ExamplesSELECT ST_Equals(ST_GeomFromText(’LINESTRING(0 0, 10 10)’),ST_GeomFromText(’LINESTRING(0 0, 5 5, 10 10)’));st_equals-----------t(1 row)SELECT ST_Equals(ST_Reverse(ST_GeomFromText(’LINESTRING(0 0, 10 10)’)),ST_GeomFromText(’LINESTRING(0 0, 5 5, 10 10)’));st_equals-----------t(1 row)See AlsoST_IsValid, ST_OrderingEquals, ST_Reverse, ST_Within7.8.20 ST_HasArcST_HasArc — Returns true if a geometry or geometry collection contains a circular stringSynopsisboolean ST_HasArc(geometry geomA);DescriptionReturns true if a geometry or geometry collection contains a circular stringAvailability: 1.2.3?This function supports 3d and will not drop the z-index.This method supports Circular Strings and Curves