Edi,
You don't have to specify the -ps parameter. You specify it only if you want
to set a specific resolution. Also, note that gdal_merge.py can accept more
than two files.
Another way to do what you are probably trying to do is to build a VRT
file[1] using gdalbuildvrt [2] and then build an ext
i have 3T of images and there are more than 12000 tiles. I want to create a
new mosaic overview. Im using the gdal_merge.py command. I cant use
gdal_merge for every 2 images. Is there any other way to merge the tiles for
the new layer? if my pixel size of the original tile are 0.08meters, how
many
