> it’s probably not feasible for a global product like Google Maps to understand and encode every regional system

Does it have to encode them all? Why not start out with one then at least Google Maps is a little better for some.

Besides that, how many systems could there be? There are only something like 10,000 cities on the planet. That sounds like the kind of task Google is built to handle.

Wait what?

I live in a small country of ~2mio pop, and we have approximately 6000 settlements with streets and street addresses and many different standards of numberings, depending on many reason, mostly historic.

Technically yes, a few thousand systems could be programmed into some google processing engine, but you'd have to manually classify every road to set the correct system, and even there, you'd never know what is a legit numbering scheme or what is an error.

For example, Cucumber street 1, 3, 5, 7, 9 on one side of the street and Cucumber street 2, 4, 6, 8, 10 on the other is a valid numbering scheme. If #3 splits his front yard and builds another house, you'd get "3a" on that side. If #6 buys #8, demolishes one or both buildings and builds a bigger one, that could become either a "6" or an "8", and the other would be missing. Then #7 is demolished and an apartment building is built there with 4 entrances to 4 separate building sections, so those would be numbered 7a, 7b, 7c and 7d, even though they're in the same building. #5, #7 and #9 are also a part of the same building (three entrances), but the building is older, the street was renamed and renumbered some time after, and each of the entrances got its own number. Then you come to #10, which is also a building with 4 entrances, but #10 goes towards Cucumber street, and the other three are facing the Lettuce street and are thus Lettuce street 6, 6a and 6b. Notice starting with the "6" here and "7a" above, well, that's because #6 lettuce street existed before the building was expanded, it kept the #6 number, but since there used to be a shed on Cucumber street #7, the new building starts with 7a.

Good luck writing a general model for that.