How to batch "gdal_merge" on Win7 in one command line command?

Question

I want to create a mosaic of all tif files in a directory on windows 7.

How could I create a one-line command in the windows command line to loop through all tifs and merge them all together using gdal_merge.py?

I tried this;

for %i in (*.tif) do gdal_merge.py -of GTiff %i mosaic.tif

but it gives me an error about mosaic not being a supported dataset name??

gdal_merge.py -optfile list.txt does not work using osgeo4w (i.e., under Windows). Throws a DLL Load failed exception — GT., Mar 06 '15 at 20:24
According to the userdocs for gdal_merge, a script exists to kludge gdal_merge wildcards into Windows gdal, but I haven't tried it. See http://trac.osgeo.org/gdal/wiki/UserDocs/GdalMerge — GT., Mar 06 '15 at 20:34

AndreJ · Accepted Answer · 2014-02-28T18:44:34.030

Your command line will try to merge mosaic.tif (as part of *.tif) with itself. Creating the mosaic in another folder would prevent that.

The correct syntax for batch processing is:

for %%N in (D:\Karten\gdal\gdal2tiles\NL50\*.tif) DO gdal_translate -of vrt -expand rgba %%N D:\Karten\gdal\gdal2tiles\NL50\%%~nN.vrt
gdalbuildvrt -allow_projection_difference index.vrt NL50\*.vrt
pause

This should also work for gdal_merge.py, but I prefer to work with the vrt solution.

score 1 · Answer 2 · answered Feb 28 '14 at 19:01

1

You do not need a batch for merging all the tif from a repository in a single tif file

gdal_merge.py -o out.tif *.tif

answered Feb 28 '14 at 19:01

radouxju

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gdal_merge.py -o out.tif *.tif does not work using osgeo4w (i.e., under Windows). Throws a DLL Load failed exception – GT. Mar 06 '15 at 20:23
According to the userdocs for gdal_merge, a script exists to kludge gdal_merge wildcards into Windows gdal, but I haven't tried it. See http://trac.osgeo.org/gdal/wiki/UserDocs/GdalMerge – GT. Mar 06 '15 at 20:34

How to batch "gdal_merge" on Win7 in one command line command?

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