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

Dave Swarthout daveswarthout at gmail.com
Wed Apr 2 12:48:33 UTC 2014

C'mon guys. Tagging an entire river at layer=-1 is simply not the way to do
things, unless it is a covered river or one that runs underground. What
other possible justification is there other than not wanting to do the work
of tagging bridges with a layer=1? If you argue it's okay if there aren't
any crossing/overlapping objects do you mean on the entire planet?

On Wed, Apr 2, 2014 at 7:07 PM, Martin Koppenhoefer
<dieterdreist at gmail.com>wrote:

> 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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Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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