Google Maps knows a lot. It knows about addresses and it knows about companies on these addresses.
As with most services it seems that Google Maps gets the reference data from different sources.
The other day I went to visit “Channel 4”, the British TV channel that hosted the UK “Big Brother” reality show until lately.
I typed in the address “124 Horseferry Road, London, United Kingdom” and got the point:
However, it seems that there is a large building up to the left called “Channel 4 Television”. Strange. Then I tried with “Channel 4, 124 Horseferry Road, London, United Kingdom”:
Oh, so I will find “Channel Four Television, 124 Horseferry Road” in the “Channel 4 Television” building only 0.2 miles west of “124 Horseferry Rd”:
Liliendahl on Data Quality 