[Tagging] layer=-1, rivers, bridges and tunnels

[Martin Koppenhoefer]

2014-04-02 13:51 GMT+02:00 Richard Z. <ricoz.osm at gmail.com>:

> It is not wrong by itself but there are many circumstances where it
> is plain wrong
>



+1, it is not wrong as long as there aren't any crossing / overlapping
objects that have a different layer in OSM (e.g. no layer tag in OSM =
implicit layer=0) but are physically or conceptually on the same layer in
reality. Basically you'd have to put all these other objects as well to
layer=-1, which in turn would most probably require you to put even more
objects on layer=-1 and so on.

cheers,
Martin
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