go get -u github.com/umpc/go-zrange

Package zrange implements an efficient algorithm for performing geospatial range queries with Geohash-encoded keys and a search radius.

The RadialRange method appears to be sufficient for range queries of around 5,000km or less. Changes that efficiently add support for larger query ranges are welcome.

... rangeParams := zrange.RadialRangeParams{ Radius: 32.18688, Latitude: 37.334722, Longitude: -122.008889, } keyRanges := rangeParams.RadialRange() ...

Note: Geohash range searches are imprecise. Results should be filtered using the input radius where precision is desired.

• The RadialRange method was inspired by the algorithm in the "Search" section of this page.