When I traveled to Costa Rica, I quickly learned that no formal addressing system exists, and instead everything is based on landmarks. This made use of GPSes extremely difficult, to the point that many people say using a GPS in Costa Rica is fairly worthless.
If I was back in Costa Rica, I'd love to be able to type HFW QMJ BBBE and be directed to my destination, rather than trying to parse "75 m Norte de la Coca Cola" -- first, where's "Coca Cola"? Wait, it's a bus station?! It was a Coca Cola plant back in the 1970s? Gee, that's helpful...
More generally: this is why everyone MUST narrow your idea's scope and build everything around that. When I hear "positioning code", my mind jumps to using this code to locate a new restaurant that opened downtown. That's worthless. Just tell me the damn street address instead.
But if you told me that this code could let me navigate to a restaurant in a city I've just traveled to for the first time, in a country that doesn't speak my native language, and doesn't do street addresses like I'd expect? I'd say you were an absolute genius.
This happens because the post focused on the idea, and barely spent a single line talking about the applications. Thus, I do what everyone else does -- I filled in the blanks. Don't let people fill in your idea's blanks!