How to cut DEM map file (maybe only tif) for QGIS?
Currently I loaded only TIF file. There are some additional (to tif) files like TFw, tif.aux.xml, tif.ovr - could QGIS use them somehow, or do these things here apply to them.
Tif file of mine currently contains data about spain, france and some more, but I would like to have only the spain (less than 4GB) or only the area around Barcelona.
If I simply cut the file with GIMP - would I lose information about map positioning and elevation data? Which tool is appropriate to take the tif file or the whole zip with 4 files, and cut the spanish area, so that when I open it with qgis, I will get the map positioned still in the right area? Or is it more easy to download another map with only the spanish area?