Cant you just modify min and max temperature to avoid that?
Good idea. I fiddled around with the temperature settings last night, but I haven't been able to get convincing results yet. I guess I need to do some more testing. Also, since the British Isles are surrounded by one big ocean, DF tends to make all of it sinister/evil/haunted, which is slightly silly. Maybe some more work with the savagery map is in order.
I like this and am new at changing worldgen stuff.
Whats requireds to use the map with worldgen, perfect world and just change the worldgen txt.?
Irish guy wants to embar/invade places.
If you just want to generate the exact world I showed in the original post, all you need to do is copy the contents of the text file I linked into your world_gen.txt (its in the data/init directory), start up DF, select "Design New World With Parameters", and choose "Europe". That should do it (Haven't tried it myself, but should work).
If, on the other, you want to create a world from another heightmap (Some very good ones can be found
here.) you have to open the image with your favorite graphics editor, crop the area you want (It needs to be square), resize this to 257x257 pixels and save as a bmp or png. This heightmap can then be imported into PerfectWorldDF. Everything you can do there (rainfall, drainage, savagery, etc.) is explained in the tutorial that comes with PerfectWorldDF.