In that case, Daniel was on the right track suggesting pgRouting (http://pgrouting.postlbs.org/). It extends PostGIS for just this sort of purpose and will likely be easier than using GEOS directly. Unfortunately, I'm no expert on pgRouting, but their website should be worth a look.
-- Mark Leslie Nandorov wrote: > i have some network data in CAD and i want to save it in a geospatial > database. My choice was postgis. Now, i want to create a topology, like in > CAD, to have functionality like "the shortest path" and stuff like that. I > dont know if postgis gives a tool to build a topology (nodes, linkers, > edges) with ur geospatial data. thanks > > best regards > > > mchapman wrote: > >> I use geos directly on windows xp using visual studio 2005. How do you >> plan to use it? >> >> Martin >> >> ------Original Message------ >> From: Mark Leslie >> Sender: [EMAIL PROTECTED] >> To: PostGIS Users Discussion >> ReplyTo: PostGIS Users Discussion >> Sent: Sep 21, 2008 5:33 PM >> Subject: Re: [postgis-users] PostGIS topology >> >> Nandorov wrote: >> >>> Hello, >>> >>> Thanks for your replies. i read the info in >>> http://postgis.com/support/wiki/index.php?PostgisTopology >>> >>> Mark, have you worked with GEOS before? I'm going to use windows >>> enviroment >>> and i guess i have to build my own installer.(I found GEOS for Linux and >>> API's for a windows build) it's GEOS a good choice? and how does it works >>> exactly? thanks >>> >>> best regards >>> >>> >> I haven't worked directly in GEOS much at all. Before you go the route >> of building on Windows, what exactly are you trying to do? >> >> -- >> Mark Leslie >> Geospatial Software Architect >> LISAsoft >> >> ------------------------------------------------------------- >> Ph: +61 2 8570 5000 Fax: +61 2 8570 5099 Mob: +61 >> Suite 112, Jones Bay Wharf 19-21 Pirrama Rd Pyrmont NSW 2009 >> ------------------------------------------------------------- >> >> LISAsoft is part of the A2end Group of Companies >> http://www.ardec.com.au >> http://www.lisasoft.com >> http://www.terrapages.com >> >> _______________________________________________ >> postgis-users mailing list >> postgis-users@postgis.refractions.net >> http://postgis.refractions.net/mailman/listinfo/postgis-users >> >> >> >> Sent via BlackBerry by AT&T >> _______________________________________________ >> postgis-users mailing list >> postgis-users@postgis.refractions.net >> http://postgis.refractions.net/mailman/listinfo/postgis-users >> >> >> > > _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users