[OSM-newbies] Evalated Walkways

[Dave F.]

Bill Ricker wrote:
>
>
> On Tue, Jan 26, 2010 at 8:55 PM, Dave F. <davefox at madasafish.com 
> <mailto:davefox at madasafish.com>> wrote:
>
>     highway=causeway
>
>
> While I can accept a causeway dry on both sides as a limiting case, a 
> causeway with inclined=up or 10% stretches my understanding of 
> Causeway to the breaking point.
>
> Rather than wikipedia, let's check OSM feature wiki - That would be
>  http://wiki.openstreetmap.org/wiki/Proposed_features/Causeway
> *Definition:* A raised way allowing passage over water, marsh land, or 
> unstable land such as sand.
>
> All examples are intrinsically flat if not wet.
>
> I don't think that fits. Nor would I tag the Great Wall of China as a 
> Causeway, as it goes up and down mountains, not through a swamp.
>
>
> This is so even if there were no underpassage below the TreeTop Way 
> for the wildlife as you seem to presume, on what evidence I can't 
> guess. A causeway like that would be contrary to sound forest 
> management. It's most likely highly cantilevered or hung between 
> pillars, to minimally disrupt the forest.
>
> Lacking an AerialPath or Treetop Way or a Catwalk, bridge=yes seems 
> close as it gets.

The wiki is not the finite answer. If it's lacking an item, add it, be 
it aerial_path or Catwalk etc. Bridge doesn't have to be the final answer.

I agree that causeway is use specifically over watery areas, so viaduct 
could be used.

http://en.wikipedia.org/wiki/Viaduct

This walkway appears to be "a bridge 
<http://en.wikipedia.org/wiki/Bridge> composed of several small spans".

Dave F.