Mark Burton <[email protected]> writes:

> The attached patch allows you to add either unpaved=yes/true/1 or
> paved=no/false/0 to a way and then it will be ignored for routing
> purposes when the GPS has been told to avoid unpaved roads.
>
> Not sure if those are the best tags to use - any thoughts?

In the massgis import, there is

  surface=unpaved

and this seems sensible.  In general I would say that mkgmap as a
'renderer' should adapt to conventional tagging practice.  I am not
clueful on using tagwatch, but I would bet there is some paved=no.

http://wiki.openstreetmap.org/wiki/Key:surface

> BTW - the unpaved road line type 0x0a has nothing to do with
> unpavedness, it's just a routable way that gets drawn as a dashed line
> (default rendering).

Interesting - I had found that and wondered by this was so hard :-)

There's a bit of mess in tagging and interestingly similarly in
garmin-land.  A road's proper label is in theory separate from
paved/unpaved - I have seen roads I'd call tertiary or at least
unclassified in Finger Lakes that aren't paved.  So I wonder if two
rules that map

  unpaved surface (however tagged) ==> set unpaved bit in Table C

together with

  unpaved surface and roadtype is less than secondary -> use 0x0a

so the routing restrictions always work, and so the user can see unpaved
roads.

Perhaps in the glorious future when we have a standard TYP file we can
have unpavd versions of the various roads.  I suspect there are a lot of
places in the world where there are roads that you'd call primary or
certainly secondary that are unpaved.

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