[postgis-users] 3D Topology

[Obe, Regina]

Depends what you are trying to do.  PostGIS has very primitive support for 3D.

1) 3D volumetric objects are not supported
2) 3D non-volume are supported partly -- e.g. a 2D polygon in 3 d space, a line, point in 3d space.
3) Spatial relationships however only really consider the spatial component of the x, y plane.

There is work in that area  - for example

http://www.foss4g2007.org/presentations/view.php/224

And work is going on in general to expand the PostGIS underlying geometry structure to support more types
such as some missing curve support types and in future TIN and so forth.


-----Original Message-----
From: postgis-users-bounces at postgis.refractions.net on behalf of Brian Sanjeewa Rupasinghe
Sent: Thu 1/1/2009 9:30 PM
To: postgis-users at postgis.refractions.net
Subject: [postgis-users] 3D Topology
 
Hi,

My question is: Does PostGIS support 3D topology?




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