[talk-au] Routing problem near Albany, WA

[Warin]

Possibly a router confusion with driving on the left... most drive on 
the incorrect side of the road and get confused when faced with the 
reverse. ??


Only thing I can see other than various offsets is the begining of the 2 
lane section heading north west .. happens a little further along.


But everything in OSM  looks ok for routing...


On 7/6/23 12:46, Josh Marshall wrote:
> Hi Ian,
>
> You can copy+paste the URL when you’re looking at the section in 
> question on openstreetmap.org <http://openstreetmap.org>.
>
> https://www.openstreetmap.org/search?query=menang%20drive#map=18/-34.96511/117.82114&layers=D 
> <https://www.openstreetmap.org/search?query=menang%20drive#map=18/-34.96511/117.82114&layers=D>
>
> I’ve turned the data layer on so you can just click on the nodes and 
> ways to see their details, and then you can copy that URL to reference it:
>
> https://www.openstreetmap.org/way/853070680
>
> So on to the question, I suspect it’s a router issue, but quite 
> possibly something to do with Menang Drive having tagging with 
> bicycle=yes cycleway:left=yes etc, but the Albany Highway ways not 
> having anything of the sort, not even lane quantity.
>
> Probably not relevant, but that greater intersection looks like it’s 
> been mapped with a variety of aerial sources but without imagery 
> offsets being taken into account. The Maxar layer looks like the most 
> recent, and once I aligned that best I could (5.24, -9.89), there are 
> still a number of roads that are well off the imagery.
>
> And the little bike diversions for merging across aren’t mapped… but 
> good riddance, they’re definitely designed by someone who thinks that 
> it’s fine for cyclists on major highways who could be doing 35 km/h to 
> slam on the brakes to take a 90º  turn to cross a lane… ugh.
>
>> On 7 Jun 2023, at 12:00 pm, Ian Steer <iansteer at iinet.net.au> wrote:
>>
>> My Garmin GPSMAP 66i gives misleading routing instructions at a new 
>> intersection on Albany Highway near Albany when using OSM data.  I 
>> have looked at the OSM data through JOSM and it all looks good.  I 
>> wondered if anyone else can see what might be causing the strange 
>> routing instructions.
>> The explanation really needs pictures, so I’ve put them in Dropbox:
>> Screenshot 1 shows the first OSM way of the section in question 
>> (highlighted in red) plus some annotations about the points where the 
>> GPS has instructions for the two misleading manoeuvres:
>> https://www.dropbox.com/s/mk7pmpucvp9y5q6/screenshot%201.jpg?dl=0
>> Screenshot 2 just shows the other OSM way that covers the section in 
>> question:
>> https://www.dropbox.com/s/wpfaip74htzbnyw/screenshot%202.JPG?dl=0
>> Screenshot 3 shows the routing instructions on the GPS:
>> https://www.dropbox.com/s/4hy8r91c5syvq4d/screenshot%203.JPG?dl=0
>> I don’t know how to give OSM way references, but the intersection is 
>> at S34.9647 and E117.8205 (Menang Drive and Albany Highway)
>> Has anyone got any clues why the GPS would be doing what it is doing ?
>> Thanks
>> Ian
>> _______________________________________________
>> Talk-au mailing list
>> Talk-au at openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk-au
>
>
> _______________________________________________
> Talk-au mailing list
> Talk-au at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-au
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-au/attachments/20230607/c1330ade/attachment-0001.htm>