[postgis-users] 3D Topology

francesco francesco.pirotti at unipd.it
Fri Jan 2 01:46:22 PST 2009

Following the question on 3D I was wondering if the 3D support in postgis includes importing/exporting PolygonZ PolylineZ and PointZ from shapefiles thus saving the z component in vertices!
Francesco Pirotti
Dept. Te.S.A.F./CIRGEO
University of Padua
Viale dell'Università 16
I-35020 Legnaro (PD)
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---------- Original Message ----------
To: PostGIS Users Discussion (postgis-users at postgis.refractions.net)
From: Obe, Regina (robe.dnd at cityofboston.gov)
Subject: RE: [postgis-users] 3D Topology
Date: 2/1/2009 5:16:10


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
 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
 My question is: Does PostGIS support 3D topology?


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