PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual137 / 310---------------------------------------------------------LINESTRING(-1.11 2.12 3 2.3456,4.11 3.24 3.1234 1.1111)See AlsoST_AsEWKT, ST_AsText, ST_GeomFromText, ST_GeomFromEWKT, ST_Simplify7.5.24 ST_TransformST_Transform — Returns a new geometry with its coordinates transformed to the SRID referenced by the integer parameter.Synopsisgeometry ST_Transform(geometry g1, integer srid);DescriptionReturns a new geometry with its coordinates transformed to spatial reference system referenced by the SRID integer parameter.The destination SRID must exist in the SPATIAL_REF_SYS table.ST_Transform is often confused with ST_SetSRID(). ST_Transform actually changes the coordinates of a geometry from onespatial reference system to another, while ST_SetSRID() simply changes the SRID identifier of the geometryNoteRequires PostGIS be compiled with Proj support. Use PostGIS_Full_Version to confirm you have proj support compiledin.NoteIf using more than one transformation, it is useful to have a functional index on the commonly used transformations totake advantage of index usage.NotePrior to 1.3.4, this function crashes if used with geometries that contain CURVES. This is fixed in 1.3.4+This method implements the OpenGIS Simple Features Implementation Specification for SQL 1.1.This method implements the SQL/MM specification. SQL-MM 3: 5.1.6This method supports Circular Strings and Curves