PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual242 / 310ExamplesSELECT ST_AsEWKT(the_geom)FROM(SELECT ST_Locate_Along_Measure(ST_GeomFromEWKT(’MULTILINESTRINGM((1 2 3, 3 4 2, 9 4 3),(1 2 3, 5 4 5))’),3) As the_geom) As foo;st_asewkt-----------------------------------------------------------GEOMETRYCOLLECTIONM(MULTIPOINT(1 2 3,9 4 3),POINT(1 2 3))--Geometry collections are difficult animals so dump them--to make them more digestableSELECT ST_AsEWKT((ST_Dump(the_geom)).geom)FROM(SELECT ST_Locate_Along_Measure(ST_GeomFromEWKT(’MULTILINESTRINGM((1 2 3, 3 4 2, 9 4 3),(1 2 3, 5 4 5))’),3) As the_geom) As foo;st_asewkt---------------POINTM(1 2 3)POINTM(9 4 3)POINTM(1 2 3)See AlsoST_Dump, ST_Locate_Between_Measures7.10.5 ST_Locate_Between_MeasuresST_Locate_Between_Measures — Return a derived geometry collection value with elements that match the specified range ofmeasures inclusively. Polygonal elements are not supported.Synopsisgeometry ST_Locate_Between_Measures(geometry geomA, float measure_start, float measure_end);DescriptionReturn a derived geometry collection value with elements that match the specified range of measures inclusively. Polygonalelements are not supported.Semantic is specified by: ISO/IEC CD 13249-3:200x(E) - Text for Continuation CD Editing MeetingAvailability: 1.1.0This function supports M coordinates.Examples