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A geohash is a convenient way of expressing a location (anywhere in the world) using a short alphanumeric string, with greater precision obtained with longer strings.

When I learn it the first time I was confused by its name. It's totally different to the other hashing algorithm, it keeps the information of the location. It's actually not a hashing algorithm but an encoding algorithm.

So how the algorithm named? Why it called Geohash?

Comments

  1. To see the different between Encoding and Hashing you can click here: Encoding vs. Encryption vs. Hashing vs. Obfuscation

  2. To see the Geohash algorithm in Java you can click here: Geohash Encoding and Decoding Algorithm

zhumengzhu
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    [Geohash](https://en.wikipedia.org/wiki/Geohash) is just a mis-guided name the original author chose, you would have to ask him why he named it that way. – zaph Mar 13 '16 at 12:45

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