[OSM-talk] routing across open spaces

[Martijn van Exel]

On Tue, Nov 30, 2010 at 4:50 PM, Nic Roets <nroets at gmail.com> wrote:

> On Tue, Nov 30, 2010 at 2:22 AM, Robin Paulson <robin.paulson at gmail.com>wrote:
>
>> hi,
>> i walk a lot, and would like a routing engine which understands i can
>> take a direct route across an open public space, such as a park,
>> without needing a footpath to be explicitly drawn in. the existing
>> routing engines don't seem to understand this.
>>
>> or am i missing a tag? do i need to tag parks, etc. with "area=yes"
>> "foot=yes", "access=yes" or would that be a case of "tagging for the
>> routing engine"
>>
>>
> Firstly note that routing across areas is (theoretically) much harder than
> routing along ways (Non-polynomial time VS polynomial time).
>
> Secondly note that the problem is not restricted to pedestrian routing,
> e.g. parking areas. There have been cases where people mapped the road
> surface as areas, although they would then also have ways running down the
> centerline.
>
> Supporting areas is on my list of things that I would like to do, but there
> are many other things in front of it. I recently added dragable routes to
> the Osm.org Routing Demo. I improved the endpoints. Negotiated for a better
> server. Routing instructions and translations. And for Christmas I want a
> mobile application for large scale collection of house numbers.
>
>
> I definitely second your call for a mobile app to easily collect house
numbers. A single-purpose app could be very simple. Would you want to have
something graphical (user pinpoints address on map on-screen) or something
even simpler (user enters housenumber, selects street based on location or
accepts best match, address node is sent to OSM). In the latter case, which
is what I would prefer, how would you deal with GPS inaccuracy?

Martijn van Exel +++ m at rtijn.org
laziness – impatience – hubris
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