[Talk-GB] building shapes from OS Street View

Ed Avis eda at waniasset.com
Sat Apr 10 10:44:51 BST 2010

Simon Ward <simon at ...> writes:

>Having looked at some of the StreetView data aroud my area, it is not
>very accurate at all (probably out of date).
>This isn’t something we can just blindly import, trace, or otherwise use
>and assume it’s of better quality.

In areas where we already have some mapping coverage we clearly need to check
that the OS map is consistent with what we have.  However, there are still large
parts of the country with little or no coverage in OSM, and in those cases we
certainly can assume that the OS data is better.

It's worth noting that the Yahoo aerial photography is also out of date; in some
cases [1] people have traced streets from the photo which bear no relation to
what's on the ground.  Yet nobody suggests we should stop tracing from it.

The places where OSM is weakest tend to be villages and rural towns; these are
also those that change slowly, so the OS map is likely to be reasonably current.

[1] http://www.openstreetmap.org/?lat=51.56496&lon=-0.04983&zoom=17&layers=B000FTF
I recently fixed this by a GPS survey; the warehouses and service roads have
been replaced by housing.  The OS Street View map is up-to-date in this area.

Ed Avis <eda at waniasset.com>

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