r.series with the aggregate minimum option I'm merging multiple viewshed results to visualize how much vertical space a development area has for new buildings. Meaning that a part of the height limitation comes from raster1.tif while the height limitations for another part of the area could come from raster2.tif etc.
Currently I'm classifying the merged results for every 4th meter and coloring it different color so that the reader can understand how much space there is left. This is a working product that fills it's purpose, BUT:
My question is if it's possible to create a compliment map that doesn't care about the actual raster values but rather visualizes the origin of the merged results? Or put in other words: can I style the raster so that values extracted from raster1.tif gets one color and values from raster2.tif another color?
I've been elaborating with a merge that stacks the input layers in different bands but haven't been able to set the color for more than three bands simultaneously, and also the aggregate minimum function is also missing in this attempted solution.
I'm currently using QGIS but also have access to FME, Arc, Mapinfo and PostGIS.