[Tagging] Tags useful for rendering of roads in poor conditions

Gerald Weber gweberbh at gmail.com
Fri Jan 3 19:08:03 UTC 2014


On 3 January 2014 15:19, Fernando Trebien <fernando.trebien at gmail.com>wrote:

> I decided to extend my comparison between tracktype and surface, now
> including smoothness. I think we may need a new tag to integrate all
> surface quality classification systems (it can well be a simple
> numeric tag). See this: http://i.imgur.com/yEJ52eE.png


This table is interesting, but in my experience computers are better at
looking up tables than humans ;) So instead of creating a new tag, why not
settle with such a lookup table for routers/renderers only?

Another idea would be to use a score system. For example the
surface=compacted scores positive, say 3, and surface=asphalt sores 5. But
smoothness=bad scores -2 and so on, from which one could obtain a measure
of the overall quality of a road.

One of the drawbacks of using a numeric grade for classifying road
conditions is that after a while people forget why they did chose a given
grade in the first place. If you leave the various tags surface, smoothness
etc this becomes essentially self-documented.

By the way, in Ouro Preto, Brazil, there are streets paved with cobblestone
which get so slippery under wet condition that they can only be used by 4x4
vehicles.
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