title: geohash and max distance
body: <p>Two geohash with first 6 characters matching, distance between two geohash is max 0.61km
  Two geohash with first 5 characters matching, distance between two geohash is max 2.5km</p>
  
  <p>Q : What is the max distance (approx) between any pair of bounding box of given geohash of  5 digit length
  </p>