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strange routing decisions #2423

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openstreetmap-trac opened this issue Jul 23, 2021 · 6 comments
Closed

strange routing decisions #2423

openstreetmap-trac opened this issue Jul 23, 2021 · 6 comments

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@openstreetmap-trac
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Reporter: dmgroom
[Submitted to the original trac issue database at 10.43pm, Friday, 6th November 2009]

Latest builds of Gosmore seem to take some strange routing decisions. The three cases I have seen so far all occur when a roundabout is involved.

Attached are screenshots of Gosmore routing decisions together with a text file showing the route as a www.yournavigation.org link (whilst I appreciate yournavigation doesn't use the current Gosmore version, providing these links seemed to me the best way of summarising the route I put into Gosmore).

@openstreetmap-trac
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Author: styno[at]hotmail.com
[Added to the original trac issue at 9.51am, Tuesday, 10th November 2009]

I cannot update http://www.yournavigation.org with a newer Gosmore version because of this ticket: http://trac.openstreetmap.org/ticket/2386

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Author: dmgroom
[Added to the original trac issue at 11.33am, Tuesday, 10th November 2009]

Replying to [comment:1 styno[at]hotmail.com]:

I cannot update http://www.yournavigation.org with a newer Gosmore version because of this ticket: http://trac.openstreetmap.org/ticket/2386

Please note my ticket 2423 did not refer to the fact that Yournavigation was out of date or making strange routing decisions. The only reason I referred to Yournavigation was to summarise the routes I was referring to as being incorrect in Gosmore.

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Author: styno[at]hotmail.com
[Added to the original trac issue at 1.03pm, Tuesday, 10th November 2009]

Replying to [comment:2 dmgroom]:

Replying to [comment:1 styno[at]hotmail.com]:

I cannot update http://www.yournavigation.org with a newer Gosmore version because of this ticket: http://trac.openstreetmap.org/ticket/2386

Please note my ticket 2423 did not refer to the fact that Yournavigation was out of date or making strange routing decisions. The only reason I referred to Yournavigation was to summarise the routes I was referring to as being incorrect in Gosmore.
Ok, I understand now. Btw, shouldn't those roundabout have a oneway tag?

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Author: dmgroom
[Added to the original trac issue at 3.38pm, Tuesday, 10th November 2009]

Replying to [comment:3 styno[at]hotmail.com]:

Replying to [comment:2 dmgroom]:

Replying to [comment:1 styno[at]hotmail.com]:

I cannot update http://www.yournavigation.org with a newer Gosmore version because of this ticket: http://trac.openstreetmap.org/ticket/2386

Please note my ticket 2423 did not refer to the fact that Yournavigation was out of date or making strange routing decisions. The only reason I referred to Yournavigation was to summarise the routes I was referring to as being incorrect in Gosmore.
Ok, I understand now. Btw, shouldn't those roundabout have a oneway tag?
Not according to http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout which states "there is no need to tag them as oneway"

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Author: styno[at]hotmail.com
[Added to the original trac issue at 4.11pm, Tuesday, 10th November 2009]

Replying to [comment:4 dmgroom]:

Replying to [comment:3 styno[at]hotmail.com]:

Btw, shouldn't those roundabout have a oneway tag?
Not according to http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout which states "there is no need to tag them as oneway"
Then Gosmore needs to learn how to use the way direction as indication on how to take a roundabout. Because, when I reverse the route of one of your examples then Gosmore consistently takes the inner corner of a roundabout. It doesn't show this behavior if a roundabout has a oneway tag (which is why I asked).

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Author: dmgroom
[Added to the original trac issue at 2.25pm, Sunday, 15th November 2009]

routing now appears correct

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