[Tagging] Mapping cave tunnels passable by human

[André Pirard]

Hi,

First, let us not confuse speleology and tourism.
OSM is the most interesting for touristic caves to walk in 2D.
Speleologists have their own 3D maps showing where to crawl.
I worked in a touristic cave when I was a student and I can tell you
that the paths look very much like man-made, especially the main
entrance that nobody would call anything else than a tunnel.
I wasn't, of course, thinking of using a (let alone) GPS to find my way
through a cave, but I would love this dialog with tourists in a cave: -
What's that map? - OpenStreetMap. Why? Doesn't it work with Google?

So, my first conclusion is: why do we insist on sticking the concept to
either cave or tunnel instead of both?

On 2014-08-14 15:47, Janko Mihelić wrote :
> The reason "renderers don't render it" is invalid because of one of
> the oldest rules in OSM: don't tag for the renderer.
There goes that nude saying again.
Tagging for the renderer is *making a tagging mistake* to obtain some
rendering.
There would be no tagging mistakes if we decided that "tunnel" applies
to some caves.
Now, regarding the difficulty to render cave=*, it's a well known fact
that many people complain to tag in vain because what they tag doesn't
show on the map (e.g. a mini-golf vs tennis pitch), because they're told
to open a rendering ticket which replies that only official tags are
supported, and because they open a vote for an official tag and nobody
signs.

The second conclusion is that it's really difficult to obtain rare
rendering, and especially like this:

On 2014-08-14 14:00, SomeoneElse wrote :
> On 14/08/2014 12:22, André Pirard wrote:
>>
>> I know I still have to learn that OSM is fuzzy, but using "cave=yes"
>> for paths would first need a definition of it in the "highway=*"  page.
>
> No, it really wouldn't(1).
>
> Cheers,
>
> Andy
>
> (1) http://wiki.openstreetmap.org/wiki/Any_tags_you_like - and yes,
> that page does discuss "Documenting tags not in Map Features" and
> "What not to map" too.
And as nobody would like to show a blank map to tourists in a cave, they
will tag for the renderer.
The nude sentence should be "don't have mappers to be forced to tag for
the renderer" instead.

André.




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