First you need to go to the Terrain Party website and do a search for the area you want to get a map of. Then export that and it will download a file to your computer. This will be a height map which you can use if you want your map to have topographical terrain (e.g. hills, bumps etc) but the easiest way is to unzip the file and then in there will be a readme file. Just open that and along the top will be displayed some coordinates. Copy those and then in the game make sure you have enabled the mod (go to Content Manager in the game's main menu and there will be a tab for mods, just check the box for this mod) and are in a new map in the map editor. Then you will see a road icon on the far right of the icon bar, click it and paste in the coordinates you copied from the readme.

Then click on download from Terrain Party, wait for it to load the height map. Click on download from Overpass API and this will download the roads from the Open Street Map site and then click Make Roads and it will start to draw in all the roads on your map.

In order to save the map for use in the game you need to make sure you have a highway connection into and out of your tiled area to the very edge of the whole map. You also need to have a water source somewhere on your map (be it a river or lake etc) and in your starting tile (you can choose which tile you start with).

I hope I've explained it well for you, if not then take a look at some YouTube video tutorials of people making maps to get an idea of what to do.

Alas, I don't have any screen capture software otherwise I'd make a tutorial myself for using Cimtographer as well. Maybe that's something I can in the future.

following this I get: System.Overflow Exception: Value too large or too small.

in the main thread in comments I saw a post saying where you can download an update for mapper.dll file that solves this issue.

I've downloaded the fixed mapper.dll but I continue to get this error every time I attempt to download from Overpass API: http://i.imgur.com/S8llN15.png

Any solution?

Originally posted by ♥♥♥♥ You Jon:

I've downloaded the fixed mapper.dll but I continue to get this error every time I attempt to download from Overpass API: http://i.imgur.com/S8llN15.png

Any solution?

I too get this error. Error 404 is not found iirc. Is the site down?