Worldmap and geohash

Hi All,
Can anybody share the algorithm to calculate geohases?
I want to do that in Oracle and after that (based on MaxMind or internal Geo Data) send it directly to Grafana (Heka) as a precalculated geohash
Is there any chance to do that?
And if so, how to configure WorldMap plugin to display pure geohashes by some groups on the map?

Looks like this is a question to Oracle community :slight_smile:
Will try to find it there first… And after that come back to configure it in Grafana.

Ok, finally i got MaxMind database in Oracle and calculated geohashes for each city.
http://dev.maxmind.com/geoip/legacy/geolite/#IP_Geolocation

So now i am collecting metrics and can use geohash in Grafana.
How to display it?

And worldmap config:

And issue: