[Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread Stuart Reynolds
Looking for some advice in Bletchley, specifically, but to answer a more 
general point about footpaths.

Please look at http://www.openstreetmap.org/#map=17/51.99530/-0.73751

Bletchley Rail Station sits in the middle, and to the west is the main road, 
which is Sherwood Drive. There is also a footpath shown coming from the station 
and along the eastern side of Sherwood Drive, but not on the western side.

This feels very wrong to me on a number of levels. For starters, the footpath 
doesn’t connect to Sherwood Drive except at the bottom, so it isn’t apparent 
that you can cross the road to go along Selwyn Grove, for example. Also, there 
is no footpath going north, nor is there a footpath on the western side of 
Sherwood Drive, despite it being quite clearly there on Streetview. In 
addition, Sherwood Drive already has the tag Sidewalk=both which rather makes 
the footpath redundant, doesn’t it?

My inclination would be to rip out the footpath and rely on the sidewalk tag, 
except that seems extreme and it isn’t wrong per se.

So what is the guidance here? Ought the road have a distinct footpath both 
sides? Or not footpath, and use the tags on the road, or just connecting spurs 
from the footpath to the road at key points (e.g. opposite Selwyn Grove), or 
what…?

Thanks
Stuart



Stuart Reynolds
for traveline south east  anglia




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Re: [Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread Richard Mann
My inclination is to draw them in (just on main roads for the moment) but I
add an adjacent=yes tag so that there's a basic flag that they're part of a
bigger street structure.

I started to do this when I wanted to mark crossings as linear features,
rather than just as dots.

Richard

On Mon, Dec 1, 2014 at 11:39 AM, Stuart Reynolds 
stu...@travelinesoutheast.org.uk wrote:

  Looking for some advice in Bletchley, specifically, but to answer a more
 general point about footpaths.

  Please look at http://www.openstreetmap.org/#map=17/51.99530/-0.73751

  Bletchley Rail Station sits in the middle, and to the west is the main
 road, which is Sherwood Drive. There is also a footpath shown coming from
 the station and along the eastern side of Sherwood Drive, but not on the
 western side.

  This feels very wrong to me on a number of levels. For starters, the
 footpath doesn’t connect to Sherwood Drive except at the bottom, so it
 isn’t apparent that you can cross the road to go along Selwyn Grove, for
 example. Also, there is no footpath going north, nor is there a footpath on
 the western side of Sherwood Drive, despite it being quite clearly there on
 Streetview. In addition, Sherwood Drive already has the tag Sidewalk=both 
 which
 rather makes the footpath redundant, doesn’t it?

  My inclination would be to rip out the footpath and rely on the sidewalk
 tag, except that seems extreme and it isn’t wrong *per se.*

  So what is the guidance here? Ought the road have a distinct footpath
 both sides? Or not footpath, and use the tags on the road, or just
 connecting spurs from the footpath to the road at key points (e.g. opposite
 Selwyn Grove), or what…?

  Thanks
 Stuart


  
 Stuart Reynolds
 for traveline south east  anglia





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Re: [Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread John Aldridge

On 01/12/2014 11:39, Stuart Reynolds wrote:

Looking for some advice in Bletchley, specifically, but to answer a more 
general point about footpaths.

 :

So what is the guidance here? Ought the road have a distinct footpath both 
sides? Or not footpath, and use the tags on the road, or just connecting spurs 
from the footpath to the road at key points (e.g. opposite Selwyn Grove), or 
what…?


I think mapping the path explicitly is perfectly reasonable if it is 
(for at least some of its length) separated from the road by a 
non-trivial distance (say more than a couple of feet of grass).


I agree that managing the transitions between such explicit paths and 
implicit sidewalk tagged sections is clunky!


--
Cheers,
John

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Re: [Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread Andy Street
On Mon, 1 Dec 2014 11:39:48 +
Stuart Reynolds stu...@travelinesoutheast.org.uk wrote:

 My inclination would be to rip out the footpath and rely on the
 sidewalk tag, except that seems extreme and it isn’t wrong per se.

I'd say that it is wrong on the basis that it implies that you may only
cross where the path shares a node with another way.

When mapping pedestrian access I always use the sidewalk tag except:

* Where there is a physical barrier between the pavement and the road.
* Where the pavement is separate from the rest of the highway - grass
  that you can step over in a single stride is still a sidewalk but
  anything greater is a path in its own right.

-- 
Regards,

Andy Street

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Re: [Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread David Woolley

On 01/12/14 11:39, Stuart Reynolds wrote:


road, which is Sherwood Drive. There is also a footpath shown coming
from the station and along the eastern side of Sherwood Drive, but not
on the western side.


I think it can be difficult to justify undoing micro-mappings, like 
this, even though they clutter the standard rendering and can be 
confusing. That's because they generally do add real information.




This feels very wrong to me on a number of levels. For starters, the
footpath doesn’t connect to Sherwood Drive except at the bottom, so it
isn’t apparent that you can cross the road to go along Selwyn Grove, for


I think this is a special case of a general problem with pedestrian 
routing that, in the absence of barriers, there can be an infinity of 
potential crossover points, not just between explicit sidewalks, but 
also between roads and adjacent fields or pedestrian squares.  I haven't 
seen the adjacent tag before, but I don't think just yes or no would be 
enough.



example. Also, there is no footpath going north, nor is there a footpath
on the western side of Sherwood Drive, despite it being quite clearly
there on Streetview. In addition, Sherwood Drive already has the tag


OS StreetView suppresses all footpaths!  Google Streetview is inadmissible.

Micro-mapping has to stop somewhere, and, if the sidewalk on the other 
side is straightforward, it might be the best place to stop.



Sidewalk=both which rather makes the footpath redundant, doesn’t it?


sidewalk=both is wrong, but that should be fixed by correcting the 
sidewalk tag.






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Re: [Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread SomeoneElse

On 01/12/2014 11:58, John Aldridge wrote:

On 01/12/2014 11:39, Stuart Reynolds wrote:
Looking for some advice in Bletchley, specifically, but to answer a 
more general point about footpaths.

 :
So what is the guidance here? Ought the road have a distinct footpath 
both sides? Or not footpath, and use the tags on the road, or just 
connecting spurs from the footpath to the road at key points (e.g. 
opposite Selwyn Grove), or what…?


I think mapping the path explicitly is perfectly reasonable if it is 
(for at least some of its length) separated from the road by a 
non-trivial distance (say more than a couple of feet of grass).


I'd agree with that - and where that isn't the case I'd definitely use 
sidewalk=left/right/both to indicate that the road has a sidewalk.


Also, it can be difficult to work out exactly what's going on if you 
haven't actually been there, so I'd be reluctant to change mapping from 
sidewalk=blah to a separate footway without a survey (unless its really 
obviously wrong - e.g. no connections at all between footpaths and 
roads).  That's not a problem here I'm sure as I suspect Traveline folks 
will all have a very good mental picture of all station surrounds on 
their patch!


Usage of adjacent seems to be fairly localised in the UK:

http://overpass-turbo.eu/s/6k7

Cheers,

Andy



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Re: [Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread Richard Mann
On Mon, Dec 1, 2014 at 12:22 PM, SomeoneElse li...@atownsend.org.uk wrote:


 Usage of adjacent seems to be fairly localised in the UK:

 http://overpass-turbo.eu/s/6k7

 Yeah, probably just me (maybe nobody else feels the need to make the
distinction). I think there are some places in Germany where they have
separately drawn all the sidewalks, might be worth looking for/at.
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Re: [Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread Craig Wallace

On 2014-12-01 13:57, Richard Mann wrote:

On Mon, Dec 1, 2014 at 12:22 PM, SomeoneElse li...@atownsend.org.uk
mailto:li...@atownsend.org.uk wrote:

Usage of adjacent seems to be fairly localised in the UK:

http://overpass-turbo.eu/s/6k7

Yeah, probably just me (maybe nobody else feels the need to make the
distinction). I think there are some places in Germany where they have
separately drawn all the sidewalks, might be worth looking for/at.


If mapping them as separate ways, you can tag them as highway=footway + 
footway=sidewalk.

See http://wiki.openstreetmap.org/wiki/Tag:footway%3Dsidewalk
That tag seems to be fairly common across much of the UK.

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Re: [Talk-GB] Advice on footpaths - when should they be separate, when not?

2014-12-01 Thread Rob Nickerson
I would map to the first dropped kerb and join back to the road. I would
leave what's there but add a link to the road (perhaps at the exit road of
the station).

Rob
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