[Tagging] Mapping nonexistent paths

Seth Deegan jayandseth at gmail.com
Mon Mar 22 18:19:22 UTC 2021

Okay, so what *should I propose?*

I'm thinking of making a different proposal that covers the whole
nonexistent issue since my current highway link proposal
itself with this problem and how highway ways that cross each other should
be mapped and tagged.

Should I propose *virtual=**, a new key or do you guys have another idea?

*Some concerns to think about virtual=* and related things:*

   - It could unintentionally be added to fictitious elements that have
   nothing to do with routing.
   - Are these cases for mapping nonexistent features limited to highways?
   Are there such things as virtual buildings or other types of areas? Could
   we just make a value that could be added to highway elements (like
   footway=virtual) so that people don't misuse the key and just use the value?
   - Virtual paths might be able to be traversed by multiple forms of
   transportation. For example, people and maintenance vehicles can both cross
   a sports pitch. Does that mean that this new tagging scheme should only be
   limited to highway=path and added access values? Should it *not *be used
   on/with other highway elements like highway=residential, highway=footway,
   highway=cycleway? Should those be reserved for *real *elements from now

*Other possible tagging ideas:*

   - routable_highway=*
   - route=yes
   - <highway element>=route/virtual (e.g. highway=footway +

lectrician1 <https://wiki.openstreetmap.org/wiki/User:Lectrician1>

On Mon, Mar 22, 2021 at 10:47 AM ael via Tagging <tagging at openstreetmap.org>

> On Mon, Mar 22, 2021 at 06:09:26PM +0300, Bert -Araali- Van Opstal wrote:
> >
> > On 22/03/2021 15:22, ael via Tagging wrote:
> > > On Sun, Mar 21, 2021 at 04:06:37PM -0600, brad wrote:
> > > > A nonexistant path shouldn't be mapped.
> > > Justification? That seems just dogmatic. A virtual path (or some
> > > equivalent) solves a longstanding problem with routers failing to cross
> > > accessible open ground.
> >
> > All routers are used by humans, mostly with a map, if I as a human
> decide to
> > use a less sophisticated one I can look at the map or at the location
> where
> > I am to decide where to pass.
> I use several routers especially when I am not very familiar with an
> area. I have often been directed far from a quick direct route because
> the routers do not cross open land. WIthout making a detour, I don't know
> whether that might be because there is a barrier or access tag that the
> router knows about but which is not shown on the map I am using. Often
> I have only a tiny screen with me.
> So, my direct experience with routers suggests that something like a
> "virtual" path could be very useful. Note that I did not suggest it.
> I just think that the basic idea could be very useful and fits a KISS
> principle: Keep It Simple St.....
> ael
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