PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual85 / 310DescriptionCreates a point with x, y and measure coordinates.NoteNote x is longitude and y is latitude.ExamplesWe use ST_AsEWKT in these examples to show the text representation instead of ST_AsText because ST_AsText does notsupport returning M.--Return EWKT representation of point with unknown SRIDSELECT ST_AsEWKT(ST_MakePointM(-71.1043443253471, 42.3150676015829, 10));--resultst_asewkt-----------------------------------------------POINTM(-71.1043443253471 42.3150676015829 10)--Return EWKT representation of point with measure marked as WGS 84 long latSELECT ST_AsEWKT(ST_SetSRID(ST_MakePointM(-71.1043443253471, 42.3150676015829,10),4326));st_asewkt---------------------------------------------------------SRID=4326;POINTM(-71.1043443253471 42.3150676015829 10)--Return a 3d point (e.g. has altitude)SELECT ST_MakePoint(1, 2,1.5);--Get m of pointSELECT ST_M(ST_MakePointM(-71.1043443253471, 42.3150676015829,10));result-------10See AlsoST_AsEWKT, ST_MakePoint, ST_SetSRID7.3.26 ST_MLineFromTextST_MLineFromText — Return a specified ST_MultiLineString value from WKT representation.Synopsisgeometry ST_MLineFromText(text WKT, integer srid);geometry ST_MLineFromText(text WKT);