GitHub - google/open-location-code: Open Location Code is a library to generate short codes, called "plus codes", that can be used as digital addresses where street addresses don't exist.

Codes are made up of a sequence of digits chosen from a set of 20. The digits in the code alternate between latitude and longitude. The first four digits describe a one degree latitude by one degree longitude area, aligned on degrees. Adding two further digits to the code, reduces the area to 1/20th of a degree by 1/20th of a degree within the previous area. And so on - each pair of digits reduces

[terurou]

Google製のGeohash的なもの

[fcicq]

geoencoding. geohash like