[agracier]

32 pixels is equal to 1.6 km or almost exactly 1 mile.

I recommend doing what agracier says, but set the map pixel size in Microdem to 200 instead of 50. This will save time. When you come to make Mymap_c, you will have to scale it up x4.

I tried doing that once and it does indeed make for easier editing in the various graphics editors - but I seemed to find that afterwards, when upscaling 4x for mymap_c, it didn