[Tagging] Mapping nonexistent paths

Peter Elderson pelderson at gmail.com
Tue Mar 23 15:15:58 UTC 2021


Brian M. Sperlongano:

> As I understand it, a "virtual" path is one that describes actual usage
> (where people walk, and should therefore be routed on) but does not
> manifest in any physical way.  Thus, a renderer could choose to not render
> these virtual connections (as they do not physically appear in the world)
> while routers can still use the data of "people walk across this place
> where there is no path".  Without some kind of tagging like virtual (or
> whatever it gets called), there is no way for renderers (who wish to
> differentiate such things) to discern the habitual paths of humans across
> the ground from physically manifested paths.
>

Well put.
There are other use cases, for cycling, ways over water (ferries, boat
routes), ways over uncharted areas, and more.
Routes and routers need the linking ways, while rendering usually does not.
Unless... it's rendering for routing; then a selection by
type/access/surface might be needed.
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