[OSM-talk] Vertical ways (staircase)

[Martin Koppenhoefer]

2010/1/5 Lester Caine <lester at lsces.co.uk>

>
> Just as we are discussing how to get 2d shapes linked to ways, you come up
> with
> the perfect argument for 3d models ;)
> There does need to be SOME level information in the tagging. The top end
> has to
> be on a level above the bottom, and the ways that are linking together
> obviously
> pass one another in different planes. A short diagonal way between the two
> will
> provide routing data, but while the ends may in practice be directly above
> on
> another, offsetting them in the area occupied by the steps gets around the
> editor limitations?
>


actually by the photo he provided in the meantime I'd say: just map normal
steps (2D-projection of the object), don't simplify (much) but try to get
the shape. Maybe both the ways have to be layer 0 at that given point, as
layers only tell about relative layering order, they do not give any
height-information (you could use the ele-tag for those, but don't expect
current routers to recognize the distance).

A structure with 2 nodes one above the other would be necessary for things
like this:
http://www.schmickler-metallbau.de/images/ref/WBH/Niederehe_Leiter.jpg

cheers,
Martin
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