[gdal-dev] Re: GCP list projection

[Chaitanya kumar CH]

Vadim,

(0,1,0,0,0,1) is the default transform and will be returned even in case of
an error.

On Fri, Feb 18, 2011 at 2:09 PM, Vadim Shlyakhov <vadp.devl at gmail.com>wrote:

> Frank Warmerdam <warmerdam <at> pobox.com> writes:
>
>
> > In theory it could make sense to have a dataset with a dataset level SRS
> > and geotransform, and also GCPs with a different SRS.  In some cases the
> GCPs
> > are in a particular SRS (say lat/long) just because it is a convenient
> > coordinate system to collect the GCPs, not because it is representative
> of
> > the geometry of the image.
>
> Thanks Frank, That was actually my understanding. BSB and Ozi have their
> GCPs in
> long/lat, so I thought that a feature for such a case.
>
> So, if you have GCP SRS, you don't need SRS set at the dataset level, do
> you?
>
> BTW I've noticed if a dataset doesn't have a geotransform, then
> ds.GetGeoTransform() returns (0.0, 1.0, 0.0, 0.0, 0.0, 1.0). Is that a
> feature
> or a bug?
>
>
>
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-- 
Best regards,
Chaitanya kumar CH.
/tʃaɪθənjə/ /kʊmɑr/
+91-9494447584
17.2416N 80.1426E
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