The algorithm is absolutely trivial -> https://en.wikipedia.org/wiki/Military_Grid_Reference_System https://en.wikipedia.org/wiki/Military_Grid_Reference_System

The algorithm is absolutely trivial -> https://en.wikipedia.org/wiki/Military_Grid_Reference_System https://en.wikipedia.org/wiki/Military_Grid_Reference_System It's actually quite pleasant to use and allows you to just truncate to the level of precision you want. S/He just posted the 1m resolution string when 18-SU-J-216-044 would get you to 100m. All this said, I think the real issue is that we refuse to PICK a standard and so every device with a GPS and ever map has one or two of -MGRS -UTM (almost identical to MGRS) -LL DD MM' SS.ss" -LL DD.dddd... -LL DD MM.mmmm...' etc. If you make a device that can output or accept a location string, make sure it can handle all LL cases and UTM/MGRS.