[Tagging] "Feature Proposal - RFC - Sidewalk

Josh Doe josh at joshdoe.com
Mon Mar 21 17:29:50 GMT 2011

Hi Peter,
Based on what you're saying I'd highly encourage you to map the
sidewalks as separate ways per David's proposal. Like Martin said,
there will inevitably be barriers on the sidewalk, varying widths, and
other issues that will get very complicated to map on the road using
sidewalk:left:barrier and the like. Even your simple case of tagging
crossings gets very complicated. I would tag the road itself only in
the simplest of situations, but if you want to start mapping
crossings, barriers, etc I would move to David's scheme.

I've successfully been mapping this way for a while now, and it's very
satisfying to use a routing service like Open.Mapquest.com to
immediately get results for routing along the sidewalks. They may
support the sidewalk:left/right/both scheme, or other routing engines
may support this, but IMHO it's far more straightforward to map
sidewalks as separate ways.


On Mon, Mar 21, 2011 at 1:12 PM, Peter Wendorff
<wendorff at uni-paderborn.de> wrote:
> Hi.
> I agree that the schemes could possibly coexist.
> What I'm missing currently at the option to tag sidewalks as tags at the
> main street (the option [1]) is the possibility to tag detailled crossings.
> How to tag attributes of a e.g. zebra crossing differing between left and
> right of the way?
> Including "namespaces" left and right might be okay at ways, but the
> crossing itself is usually tagged on a node of the way, if the sidewalks are
> not mapped separately.
> The "hack" around that would be to map sidewalks separately around the
> crossings itself - but then there is no argument left to not do that
> everywhere in the city, too.
> If anybody has a solution to tag crossings with tags only at the street's
> way, I would appreciate to learn more.
> My target group are especially people with impairments - blind people or
> people with wheelchairs. Here curb heights (sloped_curb), tactile pavings
> (tactile_paving) and features of traffic signals are especially important.
> regards
> Peter
> Am 21.03.2011 17:57, schrieb Josh Doe:
>> Serge,
>> I think we're really talking about two proposals here, both of which
>> have merit. The linked proposal has been around for a while, and
>> involves tagging the road to indicate the presence of a sidewalk walk
>> on one or both sides of the road. David refers to this proposal as
>> "deprecated" [1].
>> What David proposed, and what I'm interested in, is mapping the
>> sidewalk as a separate way from the road. This rough proposal is on
>> his page here [2].
>> I think both schemes can coexist. In cities, especially ones with
>> regular grids, the first scheme might be preferable for simplicity.
>> However David's scheme has advantages when sidewalks don't have a
>> constant offset from the road, and if there is a desire for precise
>> navigation. In my area of suburbia, I plan to use David's scheme.
>> We should certainly link both together though, so users can determine
>> what level of detail is appropriate.
>> -Josh
>> [1]:
>> http://wiki.openstreetmap.org/wiki/User:Hanska/Sidewalk#Tagging_the_main_way_.28DEPRECATED.29
>> [2]:
>> http://wiki.openstreetmap.org/wiki/User:Hanska/Sidewalk#Mapping_as_a_separate_way
>> On Mon, Mar 21, 2011 at 12:39 PM, Serge Wroclawski<emacsen at gmail.com>
>>  wrote:
>>> On Mon, Mar 21, 2011 at 12:35 PM, David Paleino<dapal at debian.org>  wrote:
>>>> On Mon, 21 Mar 2011 17:29:28 +0100, David Paleino wrote:
>>>>> On Mon, 21 Mar 2011 12:17:10 -0400, Serge Wroclawski wrote:
>>>>>> As per the discussion last week about Sidewalks, I'm re-opening the
>>>>>> sidewalk proposal as per:
>>>>>> http://wiki.openstreetmap.org/wiki/Proposed_features/Sidewalk
>>>>>> We've already had some preliminary discussion on this tag and there's
>>>>>> been very minimal disagreement, which is a good sign for its adoption.
>>>>> NAK.
>>>>> What I understood was that the first tagging example of my page was
>>>>> that [1]
>>>>> was generally accepted.
>>>> Erm.. ok, I hope it was understandable :)
>>> I don't understand, so maybe you can elaborate.
>>> David, you expressed some interest in this last week, and Josh
>>> suggested that since you were so interested, you make the proposal,
>>> but I didn't see anything, and I have a specific project I want to use
>>> these tags, so I've gone ahead and done so.
>>> If you have specific issues with the proposal, please bring them up
>>> for discussion.
>>> - Serge
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