[mkgmap-dev] [Patch] unpaved roads

Fri Feb 10 09:41:57 GMT 2017

Hi ligfietser,

good points. Attached is v7 of the patch.

reg. mtb:scale: It seems to me that many mappers confuse this with
mtb:scale:uphill.
I looked at quite a lot of ways with surface=asphalt & mtb:scale>=2
and they all look like normal roads to me. I tend to think that the tag
mtb:scale is more
likely to be wrong, mabye the road was once unpaved and later got a new
surface.
So, I think values > 2 are likely to be unpaved, below the surface tag is
more likely to 
be correct when it says something like paved. 
Possible special case: surface=wood means paved, e.g. I think of a a bridge,
BUT it might also be a construction on a difficult downhill track or a
mistake meaning "rough ground with roots or branches". 

reg. bridleways:
I've asked in the UK forum :
https://forum.openstreetmap.org/viewtopic.php?id=57310
I think that means you are right, we should treat highway=bridleway like
path.

BTW: I think the unpatched style really has an error. A way with
highway=path + sac_scale=hiking 
is not treated as unpaved. There are quite a lot of them in the Alps.

Gerd
surface_v7.patch
<http://gis.19327.n8.nabble.com/file/n5890993/surface_v7.patch>  

ligfietser wrote
> Hi Gerd,
> 
> Maybe take only mtb:scale>1 into account?
> 
> 
> Reg. bridleways, look in the UK, huge numbers of bridleways are tagged
> with surface=paved or surface=asphalt.
> 
> So I'd say better only take bridleways into account that don't have
> mkgmap:unpaved=0
> 
> 
> ________________________________
> Hi ligfietser,
> 
> reg. mtb:scale:
> both the german and english the wiki for mtb:scale=0 say "Gravel or packed
> earth". I think that means unaved.
> But you are right, a lot of ways are tagged mtb:scale=0 &surface=asphalt,
> i also found some with mtb:scale=1
> Does that mean that we should better ignore the mtb:scale tag reg.
> unpaved?
> 
> reg. bridleway:
> My understanding is that horses don't like to go on paved ways. Do you
> have an example for a paved bridleway?
> 
> Gerd
> <http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev>
> 
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