[Gdal-dev] gdal_merge.py resample method

Frank Warmerdam warmerdam at pobox.com
Mon Nov 6 10:17:57 EST 2006

guillaume huby wrote:
> Hello,
> I'm using FWTools 1.6.0
> I wondered about resample method used in gdal_merge.py when different 
> resolution are in inputs images.
> In the script I found the following documentation :
> "However,
>         if the destination file is a different resolution, or different
>         image pixel type, the appropriate resampling and conversions will
>         be done (using normal GDAL promotion/demotion rules)."
> Is the rule nearest neighbour, bilinear or some other resample method ?
> Thanks in advance for replies.


Perhaps you meant FWTools 1.0.6?

In any event, gdal_merge.py uses nearest neighbour resampling.  If you
want control over the resampling used, you should use gdalwarp instead.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo, http://osgeo.org

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