Can anyone help clarify how teh various make polygon functions work? I have a set of roughly parallel lines (depth contours)
The table also includes lines crossing these contour lines 20m 50m 100m 150m | | | | ------------------- | A | B | C | | | | | ------------------- | D | E | F | | | | | ----------------- | | | | I want to take all these lines & build polygons from them, generating vertices where the lines cross (polygons ABCDEF) I thought this was what polygonize() did, but having had a brief play with it, I believe this is not true, instead all it seems to do is turn closed lines into polygons, & perhaps include holes from closed lines inside other closed lines. Is there any way in PostGIS to take a set of intersecting lines as above & deriving the polygons from them? Thanks, Brent Wood _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
