[postgis-users] what about 3d-srids

Peter Baumann p.baumann at jacobs-university.de
Mon Apr 2 07:19:35 PDT 2012


FYI, OGC is currently intensively discussing nD CRSs. A suggestion for a name 
type specification is advanced, a CRS resolver, SECORE, has been implemented and 
is in beta. SECORE is shipped with (but independent from) the rasdaman system, 
which allows to handle nD rasters of unlimited size through a raster query 
language very efficiently.
All parts mentioned are being exercised in the EarthServer project 
(www.earthserver.eu) on 1D through 5D data of volumes growing to half a PB in 
rasdaman databases, and for Earth and Mars (thereby challenging OGC concepts for 
validation purposes).
You can download the LGPL code at www.rasdaman.org.


On 04/01/2012 11:05 PM, Felix Kunde wrote:
> Hey there
> i was wondering how 3D referencing systems will be handled in the future in PostGIS? When 3D-Datatypes, -Indexes, -Functions are introduced to the PostGIS-World why are no 3D-srids delivered in the spatial_ref_sys by default?
> I know that there are insert-stmts out there (spatialreference.org), but it seems to me, as there hasn't been much of a discussion around it yet, nobody knows what to do with it. I myself don't know much about 3d-crs. I could imagine they are more precise etc.
> The reason I'm asking is because I have recently ported a CityGML-Database with Import/Export-tool from Oracle to PostGIS (in the context of my Master Thesis), and on the oracle-side, the use of 3D-datatypes and 3D-indexes is restricted to 3d-srids. A bit of a pain but it also makes sense to me. So back to my first question: What is the PostGIS-team (or other users) thinking about the implementation and usage of 3D-crs?
> Cheers
> Felix

Dr. Peter Baumann
  - Professor of Computer Science, Jacobs University Bremen
    mail: p.baumann at jacobs-university.de
    tel: +49-421-200-3178, fax: +49-421-200-493178
  - Executive Director, rasdaman GmbH Bremen (HRB 26793)
    www.rasdaman.com, mail: baumann at rasdaman.com
    tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
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