See the links I posted in my reply to another comment here: https://news.ycombinator.com/item?id=16343367 https://news.ycombinator.com/item?id=16343367. There's

See the links I posted in my reply to another comment here: https://news.ycombinator.com/item?id=16343367 https://news.ycombinator.com/item?id=16343367. There's some good information in those talks about how you can tackle mapping information.