code: public static String encodeHash(LatLong p) {
          return encodeHash(p.getLat(), p.getLon(), MAX_HASH_LENGTH);
      }
docs: Returns a geohash of of length {@link GeoHash#MAX_HASH_LENGTH} (12) for
  the given WGS84 point.
  
  @param p
  point
  @return hash of default length