For curiosity i have build a map with satellite relief of 120x90 km,using the same parameter for Scilab of normal map.
Seems that it is right.
We can see well Garda lake in italy.
The mountains are very steep (it is all x 4 times) compared to the map from 30 km.(is not playable)
But i think that with little error of velocity of corps is possible to use a map of 40-45km build on standard map of 30km (map editor) for campaign.(also other things are wrong how distance for march area,distance guns fire etc everything has distance how variable) but if area map is more important .....
Map 2d without city in attach file