Nice work. I saw your youtube in my subscriptions and wanted to post it here my self, but followed the link and came here.
I know openstreetmap because they were at
http://www.t-dose.org last weekend. They are an opensource like (dont know the license) rival of tomtom or other streetmap suppliers that copyright their street data.
You made a way to convert streetmaps into openarena maps. Is it easy to change the scale ? maybe colors?
Too many links to all reply in one go.
But on the whole: thanks for making these wonderfull walkthroughs on how to get redo your steps, and convert stuff to openarena maps.