[OSM-talk] highway=track and motorcar=yes/no

[Rainer Dorsch]

Am Dienstag, 4. November 2008 schrieb Nic Roets:
> Using the script below I found 219469 tracks of which 202630 did not have a
> motorcar= tag.
>
> My reasoning behind gosmore was that tracks not suitable for vehicles
> should be tagged as footway. 

I think many tracks here could technically be used by motorcars, but motorcars 
are not allowed to use it (except for some special cases like if you own land 
which is accessible only using such a track or if you have special 
permission). 

A footway and a track (which is not allowed for cars) makes a huge difference 
for cyclists though. Therefore I would be hesitant to tag all tracks as 
footways (which would also be against common practice in osm).

> It's flawed because we so many unsurfaced way 
> types. Perhaps we can adopt the following scheme ? 
>
> highway=track defaults to motorcar=no
> highway=unsurfaced defaults to motorcar=yes
> highway=byway defaults to motorcar=yes

Looking at

http://wiki.openstreetmap.org/index.php/Map_Features

I did not find highway=unsurfaced 

How does it differ from the surface tag in Map_Features?

surface    paved /cobblestone /unpaved way      
Apply to all types of highways. If the tag is not present, it is assumed 
surface=paved, excepted for highway=footway. (sealed/unsealed outside UK).

For byway I have no preference, I assume there should be very few in Germany.

For track I am in favor of defaulting to motorcar=no, but let's wait what 
others think....

Thanks,
Rainer

>
> bzcat germany.osm.bz2 | awk '/<way.*id.*timestamp.*>/ { print hway, motor;
> hway=""; motor=""}; /<.*highway.*track.*>/ { hway="t" }; /<.*motorcar.*>/
> {motor=$0}' |grep '^t'|sort |less -S
>
> On Tue, Nov 4, 2008 at 10:04 PM, Rainer Dorsch <rdorsch at web.de> wrote:
> > Hello,
> >
> > I am wondering, if there is a default for motorcar defined for
> > highway=track
> > if motorcar=yes/no is not specified explicitly.
> >
> > In Germany (Switzerland and Austria as well?) there are probably a very
> > low fraction of tracks on which motorcars are allowed.
> >
> > This seems to be different in other countries, gosmore at least routes
> > cars over tracks. I am wondering if the default can be per country....or
> > how much
> > work it is to give all tracks a motorcar tag.
> >
> > Can anybody find out easily how many tracks there are in Germany without
> > an motorcar tag?
> >
> > Thanks,
> > Rainer
> >
> > --
> > Rainer Dorsch
> > Lärchenstr. 6
> > D-72135 Dettenhausen
> > 07157-734133
> > email: rdorsch at web.de
> > jabber: rdorsch at jabber.org
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> > Full GPG key: http://pgp.mit.edu/
> >
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-- 
Rainer Dorsch
Lärchenstr. 6
D-72135 Dettenhausen
07157-734133
email: rdorsch at web.de
jabber: rdorsch at jabber.org
GPG Fingerprint: 5966 C54C 2B3C 42CC 1F4F  8F59 E3A8 C538 7519 141E
Full GPG key: http://pgp.mit.edu/