The world gen file for a Netherlands Heightmapped region
Seeds are by default put to pickscout1st so you dont need to coordinate that.

If you want your own heightmaps:
http://forums.epicgames.com/threads/607176-Tutorial-Importing-Detailed-Terrain-from-Google-Earth

Google Earth
The Plugin
MicroDEM
The options in microdem are advanced, if you follow the tutorial and then derive and experiment you can achieve almost always what you want. I for example entered a custom max and min value for the heightmap, so the grayscale rendered somewhat more varied for import to allow mountains.

This was made in DF 34.10, should work in 11.