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

Ilpo Järvinen ilpo.jarvinen at helsinki.fi
Wed Apr 2 14:19:25 UTC 2014

On Wed, 2 Apr 2014, Richard Z. wrote:

> On Wed, Apr 02, 2014 at 03:53:25PM +0300, Ilpo Järvinen wrote:
> > On Wed, 2 Apr 2014, Dave Swarthout wrote:
> > 
> > > 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?
> > 
> > C'mon guys. It should be done with sensible defaults rather than forcing 
> > mappers to tell such plain obvious things. Rivers tend to pretty 
> > universally go below bridges, don't you agree?
> yes. It should be done with sensible presets, we can not change the defaults
> for features that are already in use for ages.

This is just misinformation. The default is possible to add even though 
many keep repeating it's impossible. We just need to ensure that the 
layer=* overrides and weights more than the default. Together it would 
ensure that _only_ those cases which do not have layers defined yet get 


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