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

Ilpo Järvinen ilpo.jarvinen at helsinki.fi
Fri Mar 14 22:30:30 UTC 2014

On Fri, 14 Mar 2014, Richard Z. wrote:

> On Fri, Mar 14, 2014 at 10:34:41PM +0200, Ilpo Järvinen wrote:
> > On Fri, 14 Mar 2014, Richard Z. wrote:
> > 
> > > On Fri, Mar 14, 2014 at 04:51:18PM +0100, Pieren wrote:
> > > > On Fri, Mar 14, 2014 at 4:45 PM, Richard Z. <ricoz.osm at gmail.com> wrote:
> > > 
> > > There has been a proposal long ago for bridges to have implicit an layer
> > > and it was not accepted.
> > 
> > Was that for bridges being equal to layer=1 (which would obviously be bad 
> > assumption) or for less than what layer tag can specify (e.g. +/-0.1 for 
> > bridges/tunnels or whatever < 1)?
> https://wiki.openstreetmap.org/wiki/Proposed_features/default_layer_for_bridge_and_tunnel

Sadly the mapper point of view is almost totally missing from that 
discussion. I've understood that is to most valuable resourse we've and
we should try to avoid putting any unnecessary burden on them.

Therefore, everyone needs now to handle those hardly useful layer 
warnings about trivial cases (and waste their time on "correcting" them). 
And in fact, I've wasted some time just on that today while what I'm 
really after is real geometry errors whose fixing would be much much more 
benefial but JOSM validator did not differentiate these two cases for me 
but follows such a bad spec.


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