Dudley Ibbett wrote:
Hi
It is possible to have a public_footpath rendered on tpo of a farm
access track? I haven't found an example yet. Presumably the
rendering is base on the highway tag (footway/service) and therefore
this might not be possible. I have an example where a public_footpath
(highway/footway) goes across a field, along part of a farm access
track (highway/service) and then enters another field
(highway/footway). It would seem preferable to tag the access track
as a highway/service but ideally I'd like to mark the public_footpath
on top.
There are two bits to this:
1) How do you tag a farm track so that it's both a farm track and a
public footpath in the data?
2) How do you see the fact that it's both on a map?
The answer to (1) is that (in England and Wales*) adding the tag
"designation=public_footpath" has become the accepted way for saying
this [whatever it is] really is a public footpath, in addition to the
regular access tags (foot, bicycle, etc.).
That goes alongside the highway (and perhaps surface) definitions for
the physical attributes of the track/path, so:
highway=footway
designation=public_footpath
foot=yes
would be how I'd** map a public footpath across a field that's obviously
a footway rather than something else, and
highway=track
surface=gravel
designation=public_footpath
foot=yes
access=private
would be how I'd map a public footpath along a farm gravel track that
marked as "private" for other traffic.
"designation" is also useful in those cases where public footpaths run
along public roads.
Re (2), unfortunately the OSM site's "Mapnik" map doesn't show render
the designation=public_footpath tag in any way (and the database that it
uses is optimised for the tags that it does render). There are,
however, other ways of seeing designation tags, such as Nick Whitelegg's
excellent "Freemap":
http://www.free-map.org.uk/freemap/about.html
For example, here:
http://www.free-map.org.uk/freemap/index.php?zoom=15&lat=53.09653&lon=-1.46609&layers=B0TT
is an area that shows both public footpaths and a bridleway
Other options include maps for Garmin handhelds made with "mkgmap".
That uses an easy-to-understand "style file" mechanism that essentially
allows you to render anything in OSM data as anything that a Garmin can
display.
Cheers,
Andy
* the rest of the UK doesn't have this system, a point not always
grasped by writers of pages in the OSM wiki with "United Kingdom" in the
title.
** other tags are available. There have been lots of discussions on OSM
lists such as talk-GB and tagging about this sort of stuff, enough to
send anyone to sleep. "designation" does, however, seems to have
widespread acceptance within England and Wales.
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