Geohash is nice and I use it, but I'd also like to use the straight-forward decimal coordinates.
Discussion
The [g] tags are geohash, at decreasing resolution levels. I'm not sure if the latter is very useful, perhaps it makes it easier to query relays? cc nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z