[Tagging] layer=-1, rivers, bridges and tunnels
daveswarthout at gmail.com
Wed Apr 2 06:45:00 UTC 2014
"I have discovered a bunch of rivers and streams with layer=-1 in my
local area. In my opinion this is simply wrong, so I am removing the
layer tag from the river and checking for objects which cross the
river (to tag them with layer=1."
I have done this a bit myself. I came across a river that was tagged with
layer=-3 the other day. I think the layer=1 tag for bridges is understood
to be a default by many mappers but I always include it.
On Wed, Apr 2, 2014 at 1:32 PM, Andrew Errington <erringtona at gmail.com>wrote:
> I have discovered a bunch of rivers and streams with layer=-1 in my
> local area. In my opinion this is simply wrong, so I am removing the
> layer tag from the river and checking for objects which cross the
> river (to tag them with layer=1.
> Best wishes,
> On 02/04/2014, Bryce Nesbitt <bryce2 at obviously.com> wrote:
> > The present situation is that rivers implicitly render below highways in
> > all common renderings. That's not necessarily bad. With some formality
> > the layering arrangement, it sure would save a lot of tagging hassle and
> > maintenance.
> > The new cloud tag for example, is clearly to be rendered after everything
> > but the celestial tags.
> > Ahem.
> > April 1st aside: the number of important implicit assumptions is
> > small. Rivers under, power lines over, closed ways under except if
> > tagged building, etc. Currently this type of layering is implicit in
> > various bits rendering software, but
> > it could be formalized at the tag definition level to help meet certain
> > mapper expectations.
> > ---
> > In the case of the river/highway layer warning: if the warning had never
> > existed, chances are the various workaround schemes would never have come
> > up. Rivers would run under roadways, and tagging would be needed only in
> > the rare case of a ford or an arroyo with no culvert.
> Tagging mailing list
> Tagging at openstreetmap.org
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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