Code, Documentation and Resources
All the code is available under an "Attribution-Share Alike-Non Commercial" license. I'd be glad to hear if you use it for anything interesting. The maps and XML files are released into the public domain.
Source Code
Documentation
Maps
You may download the image files (very large, register with each other) from Wikipedia:
- Greater Washington, DC Area: Road Map
- Greater Washington, DC Area: Topological Map
- Greater Washington, DC Area: Aerial Photo
Sources for all the data are described in the credits.