[gdal-dev] How to add an external mask as internal mask to a GeoTIFF?

[Daniele Romagnoli]

Hi Even,
thanks for the feedback.

I was using it as a -co "GDAL_TIFF_INTERNAL_MASK=YES" to the latest command
and I was getting

*Warning 6: driver GTiff does not support creation option
GDAL_TIFF_INTERNAL_MASK*
Appending the line you provided me to that command worked!
Thanks.
Daniele


On Tue, Jul 19, 2016 at 3:12 PM, Even Rouault <even.rouault at spatialys.com>
wrote:

> Hi Daniele,
>
> >
> > I have 2 issues with that:
> > 1) This solution is really not optimal. Wondering if there is a single
> > command to attach an external tif as a mask band of an existing raster
> > (provided it has same CRS, resolution, bbox, ecc)
>
> None that I can think of. Your workflow is probably close to optimum if you
> don't want to create the VRT at hand
>
> I think we would welcome a contribution of a Python script that would allow
> things like :
> - gdal_add_band.py -mask in.tif mask.tif out.vrt
> - gdal_add_band.py -alpha in.tif alpha.tif out.vrt
> - gdal_add_band.py in.tif extra_band.tif out.vrt
>
> > 2) What I get is that the mask has been set as an external file
> > final.tif.msk.
> > Is there any config option or opening option to open the final.tif in
> > update mode so that the band mask can be added as internal geotiff mask?
>
> Yes, "--config GDAL_TIFF_INTERNAL_MASK YES". See "Internal nodata masks"
> paragraph of http://gdal.org/frmt_gtiff.html
>
> Even
>
> --
> Spatialys - Geospatial professional services
> http://www.spatialys.com
>



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