[Tagging] Aeroway=Aerodrome Modifier Tags?

[Vincent Pottier]

Le 16/06/2010 07:17, Stephen Hope a écrit :
> I'm a little bit worried about using admin_level, as it has
> connotations of control, not just level.  It could be misinterpreted
> as who controls an airfield, rather than how important it is.
>
> What you're trying to do here is give a renderer explicit hints on how
> important something is, and what zoom level it should be on.  This
> concept can be used for many things other than airfields.  I'd prefer
> to see a generic importance tag of some sort (render_level, or
> render_importance) than can be used in many places, rather than an
> airfield specific one. You can still have specific rules for deciding
> how to apply the level, but if we can use the hinting for other
> things, and renderers can implement it only once, it's more likely to
> be accepted.  Maybe something like Render_hint = 3, hint
> type=aerodrome if we do need to differentiate between the hint types.
>    
I'm a little bit worried about using render_hint ;-)
We don't map for renderring.
I understant what you meen.  We just need to be clearer on the concept.
I will try to re-say it.
We have to find a way to tag a concept (for airport and other stuff) that is :
- based on objective data and (lenght and number of runways, trafic...)
- based on surrounding (is it the only place...)
We need to say a geographical importance of something, that should be a hint for renderers, but also that should be handfull for routing, for nominatim...

A similar discussion went on renderring fuel stations.
In a big city, we can get a lot of station. But between Alger and Niamey it is interresting to see them at lower zoom.

If the tag suggest 'rendering' someone would tag 'my bakery' at render_hint=1 for probably very good reasons (the best organic authentic bred since 1850)
If the tag suggest 'geographical importance', maybe we will avoid misuses.

As other said, we are able to do this for highways...
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FrViPofm