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I'm using QGIS 3.8 with GRASS. I have 3 rasters that are located far from each other and I would like to merge them into one raster layer.

I managed to merge 2 of them but the third one makes problem (I tried also all the 3 but it didn't work).

I got this error message:

Loading resulting layers The following layers were not correctly generated.
C:/this/is/a/path/Temp/processing_e3ae725664cf414481ec8d6bc10a25b3/c955b92928c545d29bc4ec3040703495/OUTPUT.tif
You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm.

I have created the problematic layer again but it didn't work. I don't know if it has to do with their distance from each other:

example

The blue is the merged ones and the red is the problematic raster.

My end goal is to have all of the 3 rasters in one layer. How can I achieve it?

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  • Run gdalinfo each_raster for watching Pixel Size and other possible aligning issues. – xunilk Nov 6 '19 at 14:08
  • where should I run this command – Reut Nov 6 '19 at 16:58
  • In OSGeo Console (similar to MSDos Console) into QGIS 3.8 folder. – xunilk Nov 6 '19 at 17:15
  • I get error message : No such file ot directory . It;s the first time I use this consule so maybe I don't know how to really acess my rasters. However in my Log panel, it says: 2019-11-07T10:10:48 INFO GDAL execution console output ERROR 3: Free disk space available is 56180699136 bytes, whereas 89407942624 are at least necessary. You can disable this check by defining the CHECK_DISK_FREE_SPACE configuration option to FALSE. Creation failed, terminating gdal_merge. – Reut Nov 7 '19 at 8:18
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I had the same problem with my DEM merging. Finally, I launched the QGIS desktop 3.8.3, where everything was fine. Alternatively, you can use SAGA for it. Both ways are under the link below:

QGIS Digital Elevation Model merging problem

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