Finding a pub with MongoDB and OpenStreetMap.

Pubs and OpenStreetMap are both a hobby. In this talk, I will be explaining
MongoDB's geospatial features to help you (and me) to find the closest pub.
The talk covers how the OpenStreetMap data works, how to store this in MongoDB
and what types of different queries we can run to find the closest pub. We will
be looking at some theory (some scary maths!) and some practical examples.