That is partially done with Geohash (http://geohash.org/ http://geohash.org/) and other variants. The actual step here is usage of dictionary words as digits fo

That is partially done with Geohash (http://geohash.org/ http://geohash.org/) and other variants. The actual step here is usage of dictionary words as digits for encoding instead of a bunch of random characters. Alternatively, such a system can be done by interleaving bitstrings for coordinates then converting the result to base 10000 or something and encoding each digit with a word. By using that you will get a little bit of hierarchy (the coordinates starting with same digits will correspond to sequences starting with same word). In this way we will know which zone starts with e.g. chocolate.kit.photo then it will be easier to navigate. Of course it won't beat a graph-based solution like street and building numbers.