[Gdal-dev] OCI-geometry recognition

[humarco]

Dear Stephan and Frank,

QGIS can handle data sources which return multiple geometry types, because it 
looks at the beginning of the wkb of each feature what type it has. It just 
cannot handle features with geometry type wkbUnknown (and unfortunately 2.5D 
geometries...).

Do you mean to make tests on the wkb byte sequence for a feature if it has wkb 
type unknown (0) ?

cheers,
Marco

Am Donnerstag, 21. September 2006 14:02 schrieb Frank Warmerdam:
> Stephan Holl wrote:
> >> This is not uncommon with different kinds of drivers, so if QGIS
> >> can't handle it, I think QGIS should be improved.
> >
> > In what way? That it can deal with wkbUnknown or that it can 'identify'
> > the correct geometry by itself?
>
> Stephan,
>
> Well, I was thinking in terms of working with wkbUnknown in some reasonable
> way - even if it ends up having to scan some features to establish a type
> or ask the user if it really needs a single geometry type.  Note that there
> are drivers which return a mix of geometry types such as DGN, and
> potentially OCI.
>
> Best regards,