[Talk-GB] Finding Unmapped public rights of way
sk53.osm
sk53.osm at gmail.com
Mon Jul 29 04:15:05 UTC 2013
Overview of missing Derbyshire footpaths:
http://www.flickr.com/photos/sk53_osm/9390856924/
Jerry
On Sun, Jul 28, 2013 at 5:33 PM, sk53.osm <sk53.osm at gmail.com> wrote:
> Hmm, I have sitting on my desktop a whole load of QGIS analyses of OSM
> designation=* against the DCC rowmap TAB file, but as I'm on my way to SotM
> Baltics wont write this up until I get back.
>
> I haven't looked in detail, but basic use of buffers seems to grab most
> matching footpaths (buffer OSM data, and then use the buffered data to clip
> the DCC PRoW data). Obviously crossing paths are also captured, but it
> should be relatively easy to find only those footpaths where more than n%
> of the route is within the buffered OSM path.
>
> So far I've used buffers of 10, 50 and 100m against the OSM data.
>
> I havent loaded the TAB file into PostGIS as there was some kind of
> geometry problem.
>
> Jerry
>
>
>
> On Sun, Jul 28, 2013 at 3:33 PM, Phil Endecott <
> spam_from_osmgb at chezphil.org> wrote:
>
>> Dudley Ibbett wrote:
>>
>>> I'm trying to make use of the row files on rowmaps for derbyshire and
>>> staffordshire and and merging these with and osm map file to then produce
>>> maps that can highlight which paths are and aren't mapped.
>>>
>>
>> Thanks for doing this.
>>
>> One suggestion - it would be great if the disgnation=public_footpath/**
>> bridleway
>> tags on existing paths could be tidied up at the same time. Last time I
>> looked,
>> too few had these tags to be able to use them exclusively to identify
>> footpaths,
>> and the other tag combinations tend to have many false positives.
>>
>>
>> Regards, Phil.
>>
>>
>>
>>
>>
>>
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>
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