I have an old scanned topographic map I have to georeference. Unfortunately there is no coordinate system stated and it has just on reference grid point on it. Besides that it states in the down left corner x and y in 1000 steps ranging from 1000 to 3000. It also states the scale 1:10000.
What would be the best way to georeference this kind of map? Would the scale be of any use? It is a mountainous area too, so the surface changed a lot in the meanwhile.