[mkgmap-dev] Turn restrictions with role=via ways

Sun Mar 23 08:52:53 GMT 2014

Hi all,

I am not sure how I should interpret a restriction relation with 
restriction=only_* and a via way.  AFAIK the Garmin format
doesn't have such kind of restriction, so we have to translate it 
into one or more no_* restrictions for the other possible ways.
This was rather easy for restrictions with a via node, but how 
should I do it for via ways?
Examples:
http://www.openstreetmap.org/relation/67571 
http://www.openstreetmap.org/relation/1745548

I assume I have to create a restriction that contains the node on the  from way, the two nodes 
on the via way and finally any node that can be reached from the 2nd via node 
which doesn't lie on the to road.
OK?

I probably can code support for multiple via ways as Garmin seems to support that as well,
but only if I find that in the OSM data.

@Steve: Did you see anything in your original maps which might 
also be a only_* restriction?

Gerd

From: gpetermann_muenchen at hotmail.com
To: mkgmap-dev at lists.mkgmap.org.uk
Date: Wed, 19 Mar 2014 17:32:47 +0100
Subject: Re: [mkgmap-dev] Turn restrictions with role=via ways

Hi Andrzej,

thanks, that will help me.

Gerd

Date: Wed, 19 Mar 2014 17:20:23 +0100
From: popej at poczta.onet.pl
To: mkgmap-dev at lists.mkgmap.org.uk
Subject: Re: [mkgmap-dev] Turn restrictions with role=via ways

Hi Gerd,

 > Does anybody have a valid mp file that contains 4 node restrictions

here is attached a small sample with a restriction, this example comes 
from http://ump.waw.pl/en/index.html

If you'd like to test a real piece of mp source, I have uploaded full 
region form UMP, it include img compiled by cgpsmapper:
http://files.mkgmap.org.uk/download/185/UMP-PL-Warszawa.7z

-- 
Best regards,
Andrzej

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