How to: Geohashing
Geohashing is a [geocoding](https://en.wikipedia.org/wiki/Address_geocoding) method used to encode geographic coordinates such as latitude and longitude into short alphanumeric strings. It was created by [Gustavo Niemeyer](https://twitter.com/gniemeyer) in 2008.

For example, San Francisco with coordinates `37.7564, -122.4016` can be represented in geohash as `9q8yy9mf`.