Map Builder?
I was wondering if there was a tool or app that allows you to customize a map terrain.  I would love to see a flat map with a symmetrical straight river that runs N to S.

Thank you.

BTW, is the search function on this forum broken?  Can never seem to find anything.  It always seems to return 'No results' when I search for something.
maps are all random code. if you do find a map you like,keep the code wrote down so you can recreate it. the code will give the same map as long as the same base mod is used. changing the base mod can alter the map. there are prairie maps that are flat. there are also canals and terraform tools to create the path you want.