[gdal-dev] Use GDAL to combine (rather than mosaic) rasters

[Ritvik Sahajpal]

Is there a GDAL command which can combine multiple rasters so that so a
unique output value is assigned to each unique combination of input values,
like the combine command in ArcGIS?

gdal_merge seems to mosaic rasters so it is not exactly what I need.

thanks!

rit
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