[agracier]

As far as I know, the raw data for making maps for Sturmovik is downloaded from this site:

http://srtm.csi.cgiar.org/SELECTION/inputCoord.asp

and as you can see, for some reason neither the Arctic nor Antarctic are available ... don't know why, but there it is.

If there are other sites that offer similar geographical data, then I don't know about them.