[Gdal-dev] Strange GeoTIFF error/gdal_merge.py

[Manuel Massing]

Hello Markus,

I had the same problem when creating a TIFF file and
merging datasets which did not cover the entire domain. The problem 
seems to stem from uninitialised sections of the output file,
so a workaround is to first initialise the whole dataset with e.g. 
nodata or zero values, and then proceed with merging.

I am not sure if this occurs only with tiled datasets, but it might
be an index initialisation bug of some sort? 

regards,

	Manuel