[gdal-dev] problems with merging ecw files

[Even Rouault]

Le mardi 27 mai 2014 08:28:41, Chrishelring a écrit :
> hi,
> 
> I´m trying to merge about 40 ecw files into one, using gdal_merge.py. it
> seems to work (no error), but when I´m trying to open the file, it says,
> "Unable to read header information: Cannot open file
> c:\temp\ortofoto2007\ortofoto2007.ecw".
> 
> I´m using GDAL 1.11.0 with the following command:
> 
> C:\TEMP\ortofoto2007>python C:\osgeo4w\bin\gdal_merge.py -o
> c:\temp\ortofoto2007
> \ortofoto2007.ecw --optfile c:\temp\ortofoto2007\orto07.txt
> 
> Any help would really be appreciated. :)

You would need to also specify "-of ECW" otherwise the .ecw produced is going 
to be a GeoTIFF.
Note that gdal_merge.py can have issues with big source images, so 
gdalbuildvrt + gdal_translate or gdalwarp are often better alternatives.

Even

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