On Thu, Oct 20, 2011 at 12:09:01PM +0000, Gery . wrote: > > > or should be 3 in my table! Bingo! after running: "select > st_ndims(st_convexhull(st_collect(geom)) from splitbeam_point;" I got 3 > instead of 2, so I put this3 into my table and ready! that did the trick. Now > I'm wondering why this has to be 3, I mean, this is a 2D polygon, I think > I'll realize that after keeping reading. > > Thanks again Sandro, you were very helpful,
You could have forced your output to 2d using ST_Force_2d, if that's what you needed. Why you get a 3d convexhull from a 2d input I don't know. Are you sure your input geometries are 2d ? Check st_ndims against all stages: geom, st_collect(geom) --strk; () Free GIS & Flash consultant/developer /\ http://strk.keybit.net/services.html _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
