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 <[email protected]> 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
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