On 03/07/19 11:10, brad wrote:
A pretty standard nomenclature on maps in the US for unpaved roads is
Improved Road
Unsurfaced Road (High Clearance)
Four Wheel Drive
Other variations exist , but not too dissimilar.
Pretty simple and anyone who spends time in the mountains or forest
gets a feel for what it means and has an idea what to expect. OSM is
a mess in this regards. The inconsistency make it difficult if not
impossible to render a good map.
As I read the OSM wiki, smoothness=* is the relevant tag to
distinguish between a 2wd road, a high clearance road, and a 4 wheel
drive road. Surface is important too, but isn't sufficient if it's
dirt/unpaved/ground.
There is use of 4wd_only=yes/no see
https://wiki.openstreetmap.org/wiki/Key:4wd_only
And yes the wiki/osm is a bit of a mess.
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