On Tue, Jun 16, 2009 at 01:52:33PM +0200, Andreas Neumann wrote: > Hi all, > > I am looking for either a "parallel line" feature or "open buffers around > a linestring element". > > The idea is to visualize a waste-water system where in large map scales > the actual diameter of the waste-water pipes (canalization). The linecaps > shouldn't be stroked, but the parallel offset to the centerline should be > drawn. > > Are there any tricks how this can be done in Postgis? I see that there is > st_buffer, but there is no option to get an open buffer or parallel lines.
See if what's currently referred to "Single-Sided-Buffer" and probably to become "Offset Curve" is what you're looking for. http://trac.osgeo.org/geos/ticket/215 --strk; Free GIS & Flash consultant/developer () ASCII Ribbon Campaign http://foo.keybit.net/~strk/services.html /\ Keep it simple! _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
