Felix-
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.
HTH,
Peter
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
www.faculty.jacobs-university.de/pbaumann
mail: [email protected]
tel: +49-421-200-3178, fax: +49-421-200-493178
- Executive Director, rasdaman GmbH Bremen (HRB 26793)
www.rasdaman.com, mail: [email protected]
tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
"Si forte in alienas manus oberraverit hec peregrina epistola incertis ventis
dimissa, sed Deo commendata, precamur ut ei reddatur cui soli destinata, nec preripiat
quisquam non sibi parata." (mail disclaimer, AD 1083)
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