title: How to convert a GeoJSON polygon to a list of Geohashes of a given precision in ruby?
body: <p>I'm currently working with combinations of geopoint + radius that I've successfully transformed to a GeoJSON polygon (loosing a bit of precision).
  What I need now is a conversion to a list of all Geohashes that intersects with that area with a predetermined precision.</p>
  
  <p>I've found <a href="https://github.com/derrickpelletier/geohash-poly" rel="nofollow">geohash-poly</a> which does exactly what I want but it's in javascript/node-js rather than ruby.</p>
  
  <p>Is there any equivalent in ruby out there ?
  Thanks</p>