[Openstreetmap] Coders needed for similar project & UKFOIactrequest update.

[Simon Hewison]

Clive Galway wrote:
> because you own the tracks. You can then see which roads you have
> missed, even mark out with markers who is claiming which patch to do the

.. That's where you run into problems. Suppose that Tele Atlas NV
included a fake road into their data, which got displayed by Google
Maps, which you then traced, on the assumption that all data displayed
by Google Maps is "correct". That's a copyright easter egg, and is easy
for the original creator of the data to spot, even if the co-ordinates
of the points along the line are tens of metres away from the original
data, even if it looks stylized; if there's a road there that isn't
there in reality, that's an obvious derived work.

However, if you happen to be in the area you're working on, and you then
cross-reference discrepancies between different sources (Openstreetmap,
Tele Atlas, Ordnance Survey etc), and then realise that there looks to
be some street which needs manually surveying with a GPS; only when you
actually try to drive down a road which isn't there do you know that
you've found the Easter Egg. If it's a real street, great, you've just
used other people's information to aid in your own information gathering
- to identify streets that haven't been surveyed.

-- 
Simon Hewison