[postgis-users] PostGIS Topology with Z coordinate

Berchet, Adrien adrien.berchet at forcity.com
Tue Jan 8 04:00:54 PST 2019


I am testing PostGIS Topology with 3D geometries and I am not sure of the
expected behaviour in this case. In the tests I conducted, it seems that
PostGIS Topo just ignores the Z components when searching for intersection
between geometries and thus creates some nodes where it is not needed. Is
it the normal behaviour please? Is it possible to build a real 3D topology
with PostGIS Topo?

Here is my postgis_full_version():
POSTGIS="2.5.1 r17027" [EXTENSION] PGSQL="96" GEOS="3.5.1-CAPI-1.9.1 r4246"
PROJ="Rel. 4.9.2, 08 September 2015" GDAL="GDAL 1.11.3, released
2015/09/16" LIBXML="2.9.3" LIBJSON="0.11.99" LIBPROTOBUF="1.2.1" TOPOLOGY

Thank you very much,

Adrien Berchet

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