In message , John Rowland
writes

I don't think it shows where anything is, other than the housenumbers
in Onslow Gardens, which consists of a square with two roads off one
corner, with another crossbar on one of those roads.

Surely that's the reason for the map? Finding a specific house number
would be very difficult for a stranger when there are so many different
but adjacent segments of road with the same name.
--
Paul Terry