As I understand it, there is both a written record of where the rights
of way go and the definitive map is in addition, with the written record
taking precedence?
So if a local authority is drawing their map, and it's offset from the
line of a wall for example from OS MasterMap, as the written record
might say, then it wouldn't represent the wall, nor be a substitute for
it, and it could be used independently of the OS data. Under the new
derived data rules [1], that seems to make it free to use.
Copies of the definitive map go to Ordnance Survey and are used to piece
together the 25K and 50K maps, but I'm told Ordnance Survey don't
actually digitize it properly, just trace it, they claim not to have a
vector dataset.
I don't know how local authorities are storing their data, but you can
be sure they all do it differently. If we could get our hands on copies
of the definitive map to trace (since the only feature you're copying,
was put there by the LA, not OS), would that do?
I fear the problem is that even under the exemption process of the PSMA,
the LAs don't have a dataset per se of PRoWs that they could just
release, and might not be able to justify making one.
Regards,
Luke
[1]
http://www.ordnancesurvey.co.uk/oswebsite/business/licences/using-and-creating-data-with-os-products/free-to-use-data/index.html
On 24/03/2011 12:20, Peter Miller wrote:
On 23 March 2011 19:25, TimSC <mapp...@sheerman-chase.org.uk
<mailto:mapp...@sheerman-chase.org.uk>> wrote:
Hi all,
Here is part of an email I sent to a few councils regarding rights
of way data (footpaths, bridleways, etc):
I have a big and fairly complicated request regarding the
definitive map. I am interested in making data more accessible to
the public (as encouraged by central government [1]). It would be
great if the rights of way data could be released without
restriction, specifically the definite map. As you probably know,
the rights of way data is derived from Ordnance Survey products
which until now has prevented this data being released without
restriction because of copyright. However OS will soon introduce
the Public Sector Mapping Agreement which defines how government
bodies can use OS products [2]. This includes a new mechanism for
public bodies to request datasets that have been derived from OS
products to be release either licensed as "OS OpenData" or "Free
to Use" (section 2.5 of the license [3]).
[1] http://data.gov.uk/
[2]
http://www.ordnancesurvey.co.uk/oswebsite/business/sectors/government/psma/
[3]
http://www.ordnancesurvey.co.uk/oswebsite/business/sectors/government/psma/docs/psma-member-licence.pdf
Kent County Council wrote back:
Dear Mr Sheerman-Chase
Thank you for your email.
I will forward your suggestions and comments to the Head of the
Service
and Definitive Map Team.
Kind regards
Countryside Access Service
Does anyone have any ideas on how to actually get the councils to
apply to OS to exempt their data and release it? Currently, I get
the impression that they don't rate data openness as a high
priority - they just nod and smile until I go away. It would be
good to get this data for quality assurance or even ... dun dun
dunnnnn... importing. Could we start a petition? Or use any
contacts the community has to make this happen? Any other data
sets worth liberating?
Once we have set a precedent, it should be easier to get other
councils to comply, because of the way the OS exemption process
works.
Technically I believe that the rights of way on the OS mapping is
derived from the legal documentation provided by the council. As it
happens I was talking to someone who was in a position to know about
this recently and he said that the OS don't even claim ownership of
rights of way data.
Also. my understanding is that Kent are particularly proactive on open
data. This youtube presentation is worth looking at even though it
seems to be about their map interface. Clearly they are talking the
talk on open data.
http://sparkdev.co.uk/showcase/show/open-kent
Here is another link. Carol Patrick seems to be the person to talk to.
http://www.idea.gov.uk/idk/core/page.do?pageId=9274627
Regards,
Peter
Thoughts?
Regards, TimSC
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