I have a question about the behavior of mkgmap. 

If I build 2 different maps using the same exact settings I get 2 different outputs for DEM display.

Let me try to explain. 

my settings for DEM :

--overview-dem-dist=88888

--dem-dists=9942

If I build a map, let's say Mongolia, I have DEM rendering from zoom level 3000km in basecamp... obviously not very useful but it is there.

If I build another map, let's say of europe, the DEM rendering only occurs at zoomlevel 30km and below to 20m. 

Does anyone know why?

Thank you

Joao