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List:       postgis-users
Subject:    Re: [postgis-users] neeed help in postgis
From:       Sandro Santilli <strk () keybit ! net>
Date:       2014-12-13 17:10:26
Message-ID: 20141213171026.GF31398 () localhost
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On Sat, Dec 13, 2014 at 10:50:21AM -0500, Stephen Woodbridge wrote:
> Hi Beekk,
> 
> I can't offer help with the postgis topology, but in pgrouting we do
> this with a zlevel attribute at each node. So the water might have
> zlevel=1, the bridge would have zlevel=2 and if you had a tunnel
> going under the river it might have zlevel=0. Then when we build our
> topology for routing (NOT the same thing as postgis topology), we
> use the zlevel to separate nodes at different levels.
> 
> I'm not sure if postgis topology has a similar mechanism.

No way to avoid a node on intersection with postgis topology
(and ISO Geometry Topology, differently from ISO Network Topology)

--strk;
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