Circle geometry (not part of WKT standard, but used in elasticsearch) defined by lat/lon coordinates of the center in degrees
and optional altitude in meters.
Utilities for converting to/from the GeoHash standard
The geohash long format is represented as lon/lat (x/y) interleaved with the 4 least significant bits
representing the level (1-12) [xyxy...xyxyllll]
This differs from a morton encoded value which interleaves lat/lon (y/x).