> Each place has only one code.
This doesn't really seem to be true in practice. For a reasonably large building, it seems like I could end up with two codes which for all practical purposes, are equivalent.
This doesn't really seem to be true in practice. For a reasonably large building, it seems like I could end up with two codes which for all practical purposes, are equivalent.
but I agree that the sentence itself is a bit confusing and very not technically meaningful or informative.
In my town there are two zip codes, but both of these are handled by the same post office, so it doesn't really matter which one you use. This can cause confusion though. Ensuring that multiple codes don't resolve to the same place (i.e. rectangle) means that there isn't this confusion.