This project was completed as part of Science Hack Day Boston 2015. Future steps: make a GUI?
Thanks very much to WALS for the data!
Dryer, Matthew S. & Haspelmath, Martin (eds.) 2013. The World Atlas of Language Structures Online. Leipzig: Max Planck Institute for Evolutionary Anthropology. (Available online at http://wals.info, Accessed on 2014-07-03.)