I'm currently aggregating multiple viewshed rasters keeping only the maximum value from each cell. When using r.series like shown below, the produced result is incorrect with added no data values. Why?
And as you can see above, the aggregated raster is definitely not aggregating maximum values, and on top of that adding no data values.
Is this a bug in r.series or is there something wrong with my data? I've also tried SAGA GIS Mosaic function which provides a more accurate result, but since some sort of nearest neighbor interpolation takes place, the results isn't 100% correct but much better then r.series:
Can anyone provide a work-around or point out what's wrong? Smaller clip of the data I'm using, style included. If anyone wants to try and reproduce the error?