Hi,

I want to overlay a combination of textures[TIFF files] over the terrain. 
However all of them contain some blank data along the edges which overlap with 
actual data in other files.

So is there a flag/argument to specify the data values to be ignored in the 
texture files?

Note : I cannot combine the textures using gdal merge as the combined size of 
the texture would be very high and also they might not be available together at 
once.
... 

Thank you!

Cheers,
Saket

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