I`m trying to add several raster files to one (like a merge). I tried using the raster calculator (in ArcGIS 10.2.2 and in QGIS 2.8.1 and QGIS 2.10). Anything I do leads to rasterfiles which have only NULL-Values.
Every raster has the same extent, same projection type and pixelsize. All rasters are in floating point and have NULL-Values. I tried many things but mainly I just tried to add them like:
Raster1 + Raster 2 + Raster 3 and so on.
I also tried the
melt function in QGIS and the
GRIDsum function in SAGA. It must be a problem with my data but I don´t have an idea what could be wrong.
Anyone an idea what I could try?
Edit: Also I should mention, that there is a NULL value for every pixel in at least on of the rasters used.