Visualizing Geohash

“I recently had to process data about places, or points of interest, around the globe. It was intuitive to me to try organize these records by their location. The standard way to group hadoop records is to make the records in the same group share the key prefix. I needed to somehow convert a latitude, longitude in a string of characters and that is when found Geohash. It is a well known dimensionality reduction technique that transforms the two dimension spatial point (latitude,longitude) into a alphanumerical string, or hash.
I’ll describe the  details of the points of interest processing in a future post. In this post, I will describe Geohash visually because I believe it is easier for some people (like myself) to understand and it would had saved me a some time had anyone else done it…”

http://www.bigdatamodeling.org/2013/01/intuitive-geohash.html

Advertisements