[curiousgal]

Try living in a newly built building. Every developer seems to be under the impression that if an address doesn't exist in the Google maps API, then it doesn't exist at all.

[nibbleshifter]

Or streets subdivided into clusters of houses with their own numbering systems for legacy reasons.

"4 Blah Terrace", "4 Foo View", and "4 Bar Lawn" are all within 100m of each other, have the first half of the postcode the same, etc.

Google Maps/etc can't handle this at all.