But none are "paved" in the usual sense of that word. I would hate to drive on a "fine gravel" road, or an ice road, unless I was prepared for it. Even if the fine gravel were on top of a compacted substrate it would present a hazard to bicycles and motorcycles. I'm not sure I care how a "salt" road is classified - I've never seen one let alone driven on one.

On Tue, Feb 7, 2017 at 2:41 PM, Gerd Petermann <gpetermann_muenchen@hotmail.com> wrote:
Hi all,

I noticed that the wiki
http://wiki.openstreetmap.org/wiki/Key:surface
mentions a few more surface values which are considered unpaved compared to
the default style.
The current rule in the lines file contains  this
highway=*
& (surface=cobblestone | surface=compacted | surface=dirt |
   surface=earth | surface=grass | surface=grass_paver |
   surface=gravel | surface=grit | surface=ground | surface=mud |
   surface=pebblestone | surface=sand | surface=unpaved |
   mtb:scale=* |
   tracktype ~ 'grade[2-6]' |
   smoothness ~ '.*(bad|horrible|impassable)' |
   sac_scale ~ '.*(mountain|alpine)_hiking' |
   sport=via_ferrata)
{ add mkgmap:unpaved=1 }

The wiki also llists these as unpaved:
gravel_turf , fine_gravel, ice, salt, snow, woodchips

I think the rule should at least contain gravel_turf, snow, and woodchips.
My understanding is that fine_gravel, ice , and salt are rather smooth
surfaces.

Comments?

Gerd



--
View this message in context: http://gis.19327.n8.nabble.com/unpaved-roads-tp5890722.html
Sent from the Mkgmap Development mailing list archive at Nabble.com.
_______________________________________________
mkgmap-dev mailing list
mkgmap-dev@lists.mkgmap.org.uk
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev



--
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com