[postgis-users] 3D Topology
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!
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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.
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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