additional capability test: Supports3D

[Kosta]

I would like to see an additional capability test added to OGRSFDriver::TestCapability(): Supports3D or Supports25D

The MySQL-driver does not support 3D coordinates, whereas the SQLite- & Shapefile-drivers do. I think, there are other drivers, that cannot handle 3D/2.5D data as well, so this should be queriable...

[warmerdam]

Kosta,

I would agree, but I think the solution is some sort of description of the geometry types supported for creation, not just a 2d/3d flag. Something more in keeping with the pixel data types supported metadata we have in GDAL.

I'm going to leave this open, but it is unlikely to be addressed for some time.

[Jukka Rahkonen]

Is such Supports3D test somehow possible to do nowadays, developers?

[Even Rouault]

That API doesn't exist. Frank's idea would be better, although the practical problem is that we have a ton of drivers that should be updated. I should note that for http://trac.osgeo.org/gdal/wiki/rfc49_curve_geometries I've applied a close solution by introducing a dataset level ODsCCurveGeometries AND layer level OLCCurveGeometries capabilities in the updated drivers (I wasn't aware of that ticket)

I'm not sure of the interest of keeping that ticket open. But perhaps a wiki page "Wish list", with a bit of structure, would be a better way of organizing ideas than tickets.

[Jukka Rahkonen]

I'm making a test if anybody has interest in keeping this ticket open by closing it.