[mkgmap-dev] Problem with turn restriction

Tue Feb 4 20:14:53 GMT 2014

Hi WanMil,

that's strange. With r3000 I saw many problems for Niedersachen, with 
r3002 only 4, and those were the two examples.

I am downloading latest Germany now.

Gerd

WanMil wrote
> Hi Gerd,
> 
> I think your changes are good.
> Anyhow for my special purpose I don't see any difference after your fixes.
> So I will explain what and how I am checking the restrictions (see 
> attached patch with the check code).
> 
> All restrictions that are valid after loading but which cannot be 
> written to the map because there is a problem when the 
> RestrictionRelation.addRestriction(..) is called are logged with the 
> (not very useful...) text "Late invalid: "+URL of restriction.
> 
> See relation_problems.txt with the results. There are 851 problems in 
> Germany using the tiles created with attached areas.list.
> 
> I am not sure if really all logged restrictions are completely valid but 
> all I checked should make its way into the mkgmap compiled map.
> 
> I hope this helps you to find some other problematic places!
> 
> WanMil
> 
>> Hi WanMil,
>>
>> up to now I found these reasons for problems:
>> 1) one error in the branch: via coords were replaced without updating
>> the corrresponding restrictions and the hash map
>> 2) "no_u_turn" restrictions were not added
>> if from-way and to-way are equal. They are evaluated to be valid, but
>> I don't know if they really make sense?
>> 3) restrictions are added to the restrictions hash map even if the via
>> coord is
>> not contained in the bounding box.
>>
>> 4) restrictions that have a from-way or to-way which
>> is not added with a routable type or not at all,
>> e.g. way http://www.openstreetmap.org/way/225540783
>> has no tags but is part of three restriction relations.
>> Another example:
>> http://www.openstreetmap.org/relation/2880411
>> refers to ways that are tagged lane=tertiary
>> and the default style ignores them.
>>
>> In high-prec-coords branch r3003 I've fixed 1) to 3), please
>> check again.
>>
>> Gerd
>>
>>
>>
>>  > Date: Mon, 3 Feb 2014 13:01:40 -0800
>>  > From: 

> gpetermann_muenchen@

>>  > To: 

> mkgmap-dev at .org

>>  > Subject: Re: [mkgmap-dev] Problem with turn restriction
>>  >
>>  > WanMil wrote
>>  > >> I want to make a small statistic why restriction relations become
>>  > >> invalid. Maybe the problem is so seldom that it's not worthy...
>>  > >
>>  > > I have made a short stat with the high-prec branch:
>>  > > There are around 850 relations that are valid
>>  > > (RestrictionRelation.isValid() == true) after loading but that are
>> not
>>  > > valid when the StyledConverter calls
>>  > > RestrictionRelations.convertRelation(MapCollector ...).
>>  > > So it seems to me as if the problem is greater than expected.
>>  >
>>  > Yes, sounds too much. The only good case that I can think of
>>  > is that the relation is saved by splitter because one of the
>>  > related ways has at least one point within the boundary, but
>>  > another part of the relation is outside of the boundary.
>>  > If the via node is within the tile boundary we should be able
>>  > to create the restriction.
>>  >
>>  > Gerd
>>  >
>>  >
>>  >
>>  > --
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> 
> relation_check.patch (1K)
> &lt;http://gis.19327.n5.nabble.com/attachment/5795291/0/relation_check.patch&gt;
> areas.list (14K)
> &lt;http://gis.19327.n5.nabble.com/attachment/5795291/1/areas.list&gt;
> relation_problems.txt (71K)
> &lt;http://gis.19327.n5.nabble.com/attachment/5795291/2/relation_problems.txt&gt;

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