coordinates - How to convert geometry type to latitude x longitude in Ruby -

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the postgressql dbms has st_tranform method convert coordinate stored hash (geometry column type) in latitude , longitude, how implement in ruby, or exists lib developed feature?

hashed coordinates called geohash https://en.wikipedia.org/wiki/geohash

this geohash converter ruby https://github.com/davetroy/geohash can decode geohash this:

geohash.decode('f77') => [63.98438, -73.82813]

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