See also, Geohashing: https://en.wikipedia.org/wiki/Geohashing https://en.wikipedia.org/wiki/Geohashing "Geohashing is an outdoor recreational activity inspire

See also, Geohashing: https://en.wikipedia.org/wiki/Geohashing https://en.wikipedia.org/wiki/Geohashing "Geohashing is an outdoor recreational activity inspired by the webcomic xkcd, in which participants have to reach a random location (chosen by a computer algorithm), prove their achievement by taking a picture of a Global Positioning System (GPS) receiver or another mobile device and then tell the story of their trip online."