[gdal-dev] Some questions ...

[Even Rouault]

If you need to add a new band to a GeoTIFF dataset, the only solution that 
comes to mind is to create a new dataset with N+1 bands, and copy the content 
of the N first bands of the source datasets in it.

Le Friday 15 February 2008 23:23:28 Frank Warmerdam, vous avez écrit :
> mario beaulieu wrote:
> > GDAL version 1.5
> >
> > I have 2 questions.
> >
> > 1) I want to add a raster band to a GEOTIFF dataset.  Is there any
> > method to do it since the driver seem not to support the AddBand method?
> >
> >         ERROR 6: Dataset does not support the AddBand() method.
>
> Mario,
>
> The AddBand() method is the correct method, but hardly any drivers support
> adding a band to an existing dataset. I suspect the MEM and VRT drivers
> are the only ones that currently support it.
>
> > 2) I want to create 1 BBP raster band and save it in TIFF.  How can I do?
>
> Pass the creation option NBITS=1 to the GTiff driver Create/CreateCopy
> methods.  Note, this may not work properly in pre-GDAL/OGR 1.5 versions.
>
> Best regards,