These maps are based on those from Avatar on Cyber1. Those were based on those from Heavy Harmonies. The maps there were fed into a script that parsed them and inserted the result into a MySQL database. Another script then reads the database and generates an SVG file. That SVG file is then converted into a PNG by ImageMagick.
Um, yeah, that's from Heavy Harmonies, labeled as "15-B". It probably doesn't exist in cyber1's 2Avatar. Since I don't run 15 yet, I wouldn't know. If you can confirm or deny its existence, let me know.