PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual119 / 310DescriptionAdds a point to a LineString before point (0-based index). Third parameter can be omitted or set to -1 for appending.Availability: 1.1.0This function supports 3d and will not drop the z-index.Examples--guarantee all linestrings in a table are closed--by adding the start point of each linestring to the end of the line string--only for those that are not closedUPDATE sometableSET the_geom = ST_AddPoint(the_geom, ST_StartPoint(the_geom))FROM sometableWHERE ST_IsClosed(the_geom) = false;--Adding point to a 3-d lineSELECT ST_AsEWKT(ST_AddPoint(ST_GeomFromEWKT(’LINESTRING(0 0 1, 1 1 1)’), ST_MakePoint ←↪(1, 2, 3)));--resultst_asewkt----------LINESTRING(0 0 1,1 1 1,1 2 3)See AlsoST_RemovePoint, ST_SetPoint7.5.2 ST_AffineST_Affine — Applies a 3d affine transformation to the geometry to do things like translate, rotate, scale in one step.Synopsisgeometry ST_Affine(geometry geomA, float a, float b, float c, float d, float e, float f, float g, float h, float i, float xoff, float yoff,float zoff);geometry ST_Affine(geometry geomA, float a, float b, float d, float e, > float xoff, float yoff);DescriptionApplies a 3d affine transformation to the geometry to do things like translate, rotate, scale in one step.Version 1: The callST_Affine(geom, a, b, c, d, e, f, g, h, i, xoff, yoff, zoff)represents the transformation matrix/ a b c xoff \| d e f yoff || g h i zoff |\ 0 0 0 1 /