[Talk-ca] Fwd: [Talk-GB] Definitive Paths Map Source

[Sam Vekemans]

Just forwarding this to the talk-ca list, yet another reason to not
copy from the "Trans Canada Trail"s data, as the sources are so mixed,
that you can't assume that these trails even exist.
They could have been traced from a local council maps, that was an
'legal' estimate in the 1st place.

So all we can do is simply gather what info is currently available,
and physically map the trails with GPS, and hope that local rambler
associations decide to want to donate their GPS track collections to
us. ... So we end up with a better map, but of course, not even close
to a legal document :-)

Cheers,
Sam

---------- Forwarded message ----------
From: James Davis <jamesd at jml.net>
Date: Wed, 12 May 2010 10:05:37 +0100
Subject: Re: [Talk-GB] Definitive Paths Map Source
To: "talk-gb OSM List (E-mail)" <talk-gb at openstreetmap.org>

Andy Robinson (blackadder-lists) wrote:

> My local library has the definitive statements in the one book, with
> subsequent versions over the ages added into the binding. So as you say its
> easy to compare what the statement says 50+ years ago and the changes that
> have occurred periodically with time. Updates in my area seem to be about
> every 20 years or so.

This looks like it varies a lot by area. I recently went to view the
definitive map for our area and it was a bit of a mishmash. Everything
is currently on paper, with no electronic records at all and I'm not at
all convinced that there's any clear separation between data that
belongs to the OS and data that belongs to the local authority.

I spotted no differences between the data on the definitive map and the
latest OS mapping of the area, but there are still plenty of
inconsistencies to be found:

- I've found rights of way referred to in other council documents that
aren't marked on either.
- I've found accessible and open footpaths that clearly at some stage,
by their construction, were being maintained by the local authority but
aren't recorded.
- I've found rights of way that terminate at a parish boundary, with the
physical track on the ground continuing and being open to users, but
with no records of where the right of way disappeared to.

Having access to the prow data would be great but I'm no longer
convinced by it's definitiveness :)

James

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