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

Daniele Romagnoli daniele.romagnoli at geo-solutions.it
Tue Jul 19 06:27:05 PDT 2016

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
Appending the line you provided me to that command worked!

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

> 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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Ing. Daniele Romagnoli
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