[OSM-newbies] Evalated Walkways

[Bill Ricker]

On Wed, Jan 27, 2010 at 7:28 AM, Dave F. <davefox at madasafish.com> wrote:

> The wiki is not the finite answer. If it's lacking an item, add it, be
>

only if needed, and on the Newbies list, the answer should be Ask, not Add,
as in this case.


> it aerial_path or Catwalk etc.
>

would likely be overly detailed  if there's anything generally right

 so viaduct could be used.
> http://en.wikipedia.org/wiki/Viaduct
>

*Good point, a foot  viaduct is what it is.*

But again you quote Wikipedia to choose OSM tags. OSM is not whole language
but a smaller tagging vocabulary for a database.

In OSM schema, it turns out Viaduct was rejected as a *tag* and accepted as
a *value*.

http://wiki.openstreetmap.org/wiki/*Proposed*_features/*Viaduct*

> *Status: Obsoleted<http://wiki.openstreetmap.org/wiki/Category:Proposed_features_%22Obsoleted%22>(
> inactive <http://wiki.openstreetmap.org/wiki/Category:Inactive_features>)*
> *This proposal has been obsoleted by the approved "Bridge<http://wiki.openstreetmap.org/wiki/Proposed_features/Bridge>"
> proposal.*
>


http://wiki.openstreetmap.org/wiki/*Bridge*

> There is a single "bridge=<type>" tag:
> *bridge*=yes
> *bridge*=aqueduct
> *bridge*=viaduct
> *bridge*=swing
> *bridge*=...
>
 so i suggest
*
highway=footway, bridge=viaduct,*

and at least in the WDW case where we will be adding footway and service
ways beneath,
*     layer=1
*although* *the squirrels and hedgehogs won't have layer=0 paths to conflict
in the treetop case*, *there might be a ground level nature trail as well.
*
* (Why not tag with best word from wikipedia even if not otherwise used in
OSM? While we don't tag for one render,  we also don't tag to make the
renderes' job impossible either; a custom tag usevid nowhere else will NEVER
render unless the author provides patches to each renderer, and other
database uses won't know what to make of it either.)

-- 
Bill
n1vux at arrl.net bill.n1vux at gmail.com
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