[mkgmap-dev] crude routing of my gpsmap 276Cx

Thu Sep 26 19:28:47 BST 2019

Hi

this afternoon i'm thinking about to add a rule in my style something
like this : if access=destination and maxweight=xxx remove the tag
access=destination ? Do you think its a good way to fix that problem if
some garmin devices don't look at all tags ( the ones which are
specially designed for camper, busses and lorries should do that) ?

For my opinion the used tags for that street are ok as it is not allowed
for cars havier than 7.5t to use that street

Am 26.09.2019 um 10:31 schrieb Gerd Petermann:
> Hi Manfred,
>
> Just to make that clear:
> I think that the long route is correct given the tags of the mentioned ways if the vehicle is a car. So, your first goal should be to correct the tagging.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von manfred.haiduk <manfred.haiduk at freenet.de>
> Gesendet: Donnerstag, 26. September 2019 10:20
> An: Development list for mkgmap; dd8kq at gmx.de
> Betreff: Re: [mkgmap-dev] crude routing of my gpsmap 276Cx
>
> Thank you for the information. I will try this later this week and keep you informed. BTW, i can remember some years ago when i have not used OSM Data on may Garmin but on a smartfone navigation system with OSM, there was the same fault on that device with a long detour. But after some data updates the routing failure on that device was gone
>
>
>
> Von meinem Samsung Gerät gesendet.
>
>
> -------- Ursprüngliche Nachricht --------
> Von: Gerd Petermann <gpetermann_muenchen at hotmail.com>
> Datum: 26.09.2019 09:52 (GMT+01:00)
> An: Development list for mkgmap <mkgmap-dev at lists.mkgmap.org.uk>, dd8kq at gmx.de
> Betreff: Re: [mkgmap-dev] crude routing of my gpsmap 276Cx
>
> Hi Manfred,
>
> I don't know the actual signs and I don't care if the tagging is right or wrong. At least the combination of bicycle=yes and foot=no on https://www.openstreetmap.org/way/25285589 looks very wrong:
> bicycle=yes
> fixme=check access rules
> foot=no
> highway=tertiary
> maxspeed=30
> maxweight=7.5
> name=Brandenberger Straße
> ref=K 30
>
> Anyway, it seems that mkgmap sets the correct flags for the road, the Garmin algo seems to simply ignore the "no-through-route" flag when the detour is
> too long. I've tried this with a sample file where the shortest route goes through a road with access=destination + highway=residential and the longer route
> just has ways with highway=residential. As long as the detour is rather small Mapsource takes the longer (allowed) route when using the car profile.
> All other profiles seem to always use the shorter route. So, either something is wrong in the map data (problem in mkgmap) or something is wrong in the Garmin algo.
>
> Please try if you can reproduce the long route using a map created with mkgmap r4292 and the default style coming with that version.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von manfred.haiduk <manfred.haiduk at freenet.de>
> Gesendet: Donnerstag, 26. September 2019 09:14
> An: Development list for mkgmap; dd8kq at gmx.de
> Betreff: Re: [mkgmap-dev] crude routing of my gpsmap 276Cx
>
>
>
> For your additional information, i think the tag access=destination is to be seen with the additional tag for weight limit, as the street is not allowed to be used for cars heavier than 7.5 tons
>
> Von meinem Samsung Gerät gesendet.
>
>
> -------- Ursprüngliche Nachricht --------
> Von: Gerd Petermann <gpetermann_muenchen at hotmail.com>
> Datum: 26.09.2019 08:55 (GMT+01:00)
> An: Development list for mkgmap <mkgmap-dev at lists.mkgmap.org.uk>, dd8kq at gmx.de
> Betreff: Re: [mkgmap-dev] crude routing of my gpsmap 276Cx
>
> Hi Manfred,
>
> I tried to reproduce your results with BC but I get a different route.
> at the moment I wonder why Mapsource shows the shorter route when using car/motorcycle. The ways
> https://www.openstreetmap.org/way/25285586 and https://www.openstreetmap.org/way/25285589
> both have the tag access=destination, so my understanding is that cars should not be routed through them, but this seems to be ignored.  I'll have to find out why.
>
> Gerd
>
> ________________________________________
> Von: DD8KQ <dd8kq at gmx.de>
> Gesendet: Mittwoch, 25. September 2019 14:53
> An: Development list for mkgmap; Gerd Petermann
> Betreff: Re: [mkgmap-dev] crude routing of my gpsmap 276Cx
>
> Hi Gerd
>
> it's really weird. Trying this with MapSource you are right, there is no
> long detour. But, then, i tried the same with BaseCamp and you know
> what, BaseCamp produced on my Laptop this detour, see attached picture
> Test2.
>
> And just for testing, i tried the same area on a Smartfone running the
> Navigator App with OSM maps, and this progromm is routing the same
> detour, see picture screenshot.
>
> So for me there must be something in the OSM Source regarding the street
> K30 which will cause the strange routing. But my experience is too small
> to figure it out
>
> Am 25.09.2019 um 11:12 schrieb Gerd Petermann:
>> Hi Manfred,
>>
>> No idea. I cannot reproduce the result with the default style in Mapsource. I tried with vehicle car as well as with cycling or pedestrian, I never get the long detour.
>> Can you reproduce it with Mapsource? If yes, please provide more details about the routing settings.
>>
>> ________________________________________
>> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von DD8KQ <dd8kq at gmx.de>
>> Gesendet: Dienstag, 24. September 2019 21:58
>> An: Development list for mkgmap
>> Betreff: [mkgmap-dev] crude routing of my gpsmap 276Cx
>>
>> Hi
>>
>> may be that somebody has an idea why the routing of my gpsmap 276Cx is
>> so crude. I'm using almost the standard style to build my own garmin
>> maps. And as the example is mostly in the vicinity of my hometown,i had
>> not experienced this error before, as i need not a gps in my home area.
>> If you look at picture 20190924_173131.jpg this is a routing i would
>> expect to the destination, short and fast. If you look at
>> 20190924_173229.jpg, the destination is only a few meters away from the
>> first one, the routing is nearly three times more than before with the
>> same settings on my device. I would appreciate any advice what to change
>> or any hint where i can look for why this could happen.
>>
>> Btw, if i change the setting to use bicycle routing, the device will use
>> for both destinations the expected way
>>
>> --
>>
>> #####################################################
>>
>>         Viele Grüße und 73 de Manfred Haiduk, DD8KQ
>>         e-mail mhaiduk at t-online.de dd8kq at gmx.de
>>
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>>
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>>
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>
>        Viele Grüße und 73 de Manfred Haiduk, DD8KQ
>        e-mail mhaiduk at t-online.de dd8kq at gmx.de
>
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      Viele Grüße und 73 de Manfred Haiduk, DD8KQ
      e-mail mhaiduk at t-online.de dd8kq at gmx.de

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