[mkgmap-dev] [PATCH v1] Wrong turn heading when using --process-exits

Wed Jan 29 21:26:04 GMT 2014

Hi WanMil,

later on the value is converted to 8 bit precision, see RouteArc:
writer.put((byte)(256 * initialHeading / 360)); 
If I got that right, Steve recently found out that mkgmap is not (always)
writing correct info, so I suggest to wait for his final results.

Gerd

WanMil wrote
> Hi,
> 
> attached is a patch that should fix a problem with wrong turn headings 
> when using process-exits or process-destination.
> 
> @Gerd, Steve: In RoadNetwork.addRoad link 149+150 a bearing is 
> calculated but the double bearing is converted to int. Why is the double 
> value not rounded? I think this might create problems in some cases?
> 
> WanMil
> 
>> Hi Jonas,
>>
>> thanks for the test case.
>> I will have a look on it but it will take some time.
>>
>> WanMil
>>
>>> Oh, I forgot the link to the minimal test map and .osm extract:
>>>
>>> http://brutus.dalom.com/~jetthe/OSM/mkgmap/lkpg_113/
>>>
>>> /Jonas
>>>
>>>
>>> On Mon, Jan 6, 2014 at 10:18 PM, Jonas Tull &lt;

> jonas@

> &gt;> &lt;mailto:

> jonas@

> &gt;> wrote:
>>>
>>>     Hi!
>>>
>>>     I have an issue where a motorway_link which is modified by
>>>     --process-exits gives the wrong turn heading instruction in my GPS
>>>     (Nüvi 205). "Turn left at Exit 113" instead of "Turn right at Exit
>>> 113".
>>>
>>>     The way is http://www.openstreetmap.org/way/4400960
>>>
>>>     When looking at the map in QLandkarte it looks like the first two
>>>     ways created when the _link way is split are almost parallel to the
>>>     motorway. My guess is that it's somehow related to the relatively
>>>     long distance between the first and second node in the original
>>>     _link way.
>>>
>>>     I build my maps with the following (relevant?) arguments:
>>>     --adjust-turn-headings --route --housenumbers --process-destination
>>>     --process-exits
>>>
>>>     This issue can also be seen in the maps downloaded from
>>>     http://garmin.openstreetmap.nl/
>>>
>>>     /Jonas
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> mkgmap-dev mailing list
>>> 

> mkgmap-dev at .org

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>>>
>>
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> 
> destination_orientation_v1.patch (1K)
> &lt;http://gis.19327.n5.nabble.com/attachment/5794722/0/destination_orientation_v1.patch&gt;

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