[Talk-GB] Definitive Public Right Of Way map for Northumberland
mapping at sheerman-chase.org.uk
Thu Apr 21 13:50:36 BST 2011
On 21/04/11 12:14, Graham Stewart wrote:
> Where do we stand if I manually create a way (i.e. by tracing from Bing
> imagery or by surveying it) and then refer to this published definitive
> map to determine if it is a designated footpath/bridleway/BOAT? (And
> possibly get other details that could be used in tags/notes like an
> Presumably this would be using the council's data and we would need some
> form of agreement with them?
The most I do is to compare the maps and how well or badly we are doing.
It might also "inspire me" to go and find a footpath in the real world.
In the end, all data should come from direct observations (or legally
compatible data sets). I usually take extra care to photograph the signs
and upload traces to show we actually surveyed things. I would strongly
advise against taking the classification or route number from any
council map or data set without permission (and some apparently do have
permission). (Robert just made the same point.)
If we can get agreement from them and OS, we can use the data in OSM.
Some councils seem to have a more permissive attitude. Mike Harris
mentions two councils that have no restriction on the definitive map (as
long as the underlying OS map not covered) . Mike, which council's
are these, and are they willing to make a public statement? (An FOI can
be used to force a response, but strictly speaking, FOI should be used
for fractal data, not interpretation of law.) Contrary to Robert's view,
I don't think FOI can be used to get the information directly, as the
FOI response is still copyright.
I still think that the PSMA exemption route might be necessary, because
it seems likely to me the definitive map is a derivative work from OS
maps. If anyone has relevant contacts in local authorities, please make
them aware of the option and encourage them to take it. The council
might release the data as "free to use" or as OGL or Opendata, and I am
not sure if the OGL or Opendata is compatible with the CTs... (I suspect
If you have patience, the OS 7th series sheets that are coming out of
copyright and have rights of way on them. Of course they are 50 years
out of date... (but it's mostly accurate in my experience).
> (God how I hate licensing/copyright issues!)
I second that motion.
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