Strange Routing

[Helmut Jarausch]

Hi, I don't understand the routing of OSMAnd. I have the following situation:

D              x           I

                 O

I want to drive from O via I to D. 

There is a highway connecting D, x and I. 

OSMAnd suggests to drive from O to x to I (and back to x and D) 

This takes 2 hours and 2 minutes. 

Inserting an additional intermediate point on a country road between O and I gives a much shorter route of only 1 hour and 45 minutes. 

This is all with the standard car routing.

Can anybody understand OSMAnds routing here.

I have seen the car profile has "prefer highways" option which can't be turned off. 

How to teach OSMAnd to calculate the shortest (w.r.t time) route? 

Many thanks for a hint 

Helmut

If someone wants to try it himself here are the coordinates 

D : 50.80729° N, 6.17105° E

I  : 51.22824° N, 7.20733° E

O : 51.16853° N, 7.08233° E

additional intermediate point : 51.20348° N, 7.16982° E

One needs the map of Germany (Nordrhein-Westfalen) 

[Harry van der Wolf]

Hi, 

I only used O, I and D. 

When using OsmAnds default routing options under car, I get route 1 (see attached).

When using a modified routing using a hc=1.3 I also get route 1.

When using a modified routing uing hc=1.5, I get route 2 (attached, zoomed in).

Di you perhaps play with the heuristic coefficients? Like discussed in a previous post?

Please note that when using higher hc's, smaller details might get overlooked. I personally use hc=1.3 for "daily use", and 1.5 for long trips like on holidays and the like.

Both images have been reduced in size.

route 1

route2

 

Op vr 1 nov. 2019 om 16:00 schreef Helmut Jarausch <hjar...@gmail.com>:

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[Helmut Jarausch]

Many thanks Harry for solving that mystery.

I did copied your mycar15.xml to... net.osmand.plus/files/Routing. 

But this heuristicCoefficient got used for the standard car profile as well.

Then I modified your mycar15.xml file (see the attached diff) and now it works! 

Helmut

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