Use this to create a somewhat accurate version of North America!

You may need to pause world gen and check to ensure that the temperatures are correct, and that the rivers are following the correct course. The Colorado and Upper Mississippi rivers can be particularly fiddly.

UPDATE: 8/10/2010

Version 2.0 has been released! I learned a lot about worldgen making this, and decided to try again. The worldgen has been redone from scratch, and now includes smaller sizes for people who use a normal Computer.

UPDATE TO UPDATE: 8/10/2010

Version 2.3 has been released. Now you can have sedimentary layers!

UPDATE: 7/10/2014

Version 3.0 is available. This is compatible with DF2014 through v0.40.02

UPDATE: 7/12/2014

I have updated the heightmap and fiddled with some settings. I was very unhappy about the volcanoes in the oceans, they should appear in more realistic places now.

Samples! (Updated to Version 3.2!)

Large Worldgen:


Medium Worldgen:


Small Worldgen:




Please let me know if you have any suggestions or improvements I could make.