GeoHash

Geohash is a latitude/longitude geocode system invented by Gustavo Niemeyer when writing the web service at geohash.org, and put into the public domain. It is a hierarchical spatial data structure which subdivides space into buckets of grid shape.

简单说，GeoHash是一个将经纬度信息编码成一个string的算法。从而便于储 …

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