PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual228 / 310| --ETC-- ,3.94235584120969 3.58527096604839,4 3))--3D exampleSELECT ST_AsEWKT(ST_LineToCurve(ST_GeomFromEWKT(’LINESTRING(1 2 3, 3 4 8, 5 6 4, 7 8 4, 910 4)’)));←↪st_asewkt------------------------------------CIRCULARSTRING(1 2 3,5 6 4,9 10 4)See AlsoST_CurveToLine7.9.12 ST_MemUnionST_MemUnion — Same as ST_Union, only memory-friendly (uses less memory and more processor time).Synopsisgeometry ST_MemUnion(geometry set geomfield);DescriptionSome useful description here.NoteSame as ST_Union, only memory-friendly (uses less memory and more processor time). This aggregate function worksby unioning the geometries one at a time to previous result as opposed to ST_Union aggregate which first creates anarray and then unionsThis function supports 3d and will not drop the z-index.ExamplesSee ST_UnionSee AlsoST_Union7.9.13 ST_MinimumBoundingCircleST_MinimumBoundingCircle — Returns the smallest circle polygon that can fully contain a geometry. Default uses 48 segmentsper quarter circle.Synopsisgeometry ST_MinimumBoundingCircle(geometry geomA);geometry ST_MinimumBoundingCircle(geometry geomA, integer num_segs_per_qt_circ);