Geohashes for my photos

Almost all my photos contain the coordinates of where the shot was taken in the EXIF metadata of the respective file. For this purpose, my Android smartphone has a built-in GPS receiver, and I equipped my Nikon D500 with a Dawntech di-GPS Eco ProFessional 2 a couple of years ago, although I sometimes forget to switch the thing on and then have to add the location later manually in Lightroom.…