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JambaFee

Routing from 47.82366667, 15.12866667 to 46.7577368, 15.96274687 with following options:

Fastest route
default car profile, "primary road", "major road", "secondary road", "local connecting road", "local road of high importance", "local road" and "small local road" enabled, all the rest is disabled:

PC: 299 km, 04:31:07
Android: 299 km, 04:31

With "small local roads" disabled the result is:

PC: 200 km, 03:07:13
Android: 205 km, 03:07

That’s on both platforms an inacceptable detour of almost 100 km (50 %) and 1,5 hours (45 %) when "small local road" is enabled.

This error already has been described
here ==> https://forum.mapfactor.com/discussion/8143/ (Aug 2017) and
here ==> https://forum.mapfactor.com/discussion/8807/ (May 2019) and maybe on other places.

It is obvious that this is a serious error in route calculation and it’s unbelievable that such a major bug is already known a few years and there is neither a reaction of Mapfactor nor a bug fix.

tomas

with default car settings I get 211km with small local roads disabled and 222km with small local roads enabled

with TomTo it is 220km and 224km respectively

I would say that you made some other changes

JambaFee

Dear tomas,

today I installed MFN on a PC as well as on an Android device where there never have been any MFN installations to be sure to have untouched configurations. The result:

"small local road" enabled:

PC: 294 km, 04:28:54
Android: 299 km, 04:31

"small local road" disabled:

PC: 200 km, 03:07:13
Android: 205 km, 03:07

So

1) Maybe Tomas your configuration is different from standard?
2) Maybe someone else could check the results on her/his installation?
3) Any other ideas what I could have done wrong with my implementations?

"small local road" enabled:

"small local road" disabled:

car settings:

Delfin

I get exactly the same results as JambaFee.

tomas

I reset vehicle profiles to default, now I get 204km without small local roads and 203km with

but I noticed that JambaFee has also disabled motorways, which I missed in his first post

this is not bug, it is part of hidden settings to make calculation/recalculation fast as mobile devices have limited recourses

to unlock these hidden settings go to settings/vehicle profiles and press screen for 20s - please remember, higher numbers mean slower calculation

john_percy

@tomas
What exactly do you press and on which screen? I've not managed to find it.

Oldie

Just somewhere in the white wild. You will get an additional menu in the upper right corner "Erweitert" (in Englisch probably "Extended" or the like). Tapping this you get this screen, which is not self explanatory for me:

tomas

top part is for overall settings, bottom part with motorways off

expansion limit is how many links routing uses around departure/destination/waypoint, distance is in meters from departure/destination/waypoint

once these limits are reached, only transit network is used (mostly motorways)

for example, driving from a to b without motorways, where distance is higher then 2x250km you will need to extend distance (bottom half) to more then 250000 and probably also expansion limit, possibly to 500000 (this really depends where it is - urban areas have more links then rural)

remember, higher numbers mean slower computation

Oldie

May be, this is the same issue as here: https://forum.mapfactor.com/discussion/8874/oh-no#Item_17? Only that Navigator makes 800km+ for just 3,5km there?

tomas

probably not

2highlander

Do I interpret this menu right? Is this an indirect option to determine how 'curvy' navigation is...?

Oldie

Resetting the values in the extended menue with the relevant button does not restore the values as they had been before any change had been made. Expansion limit above is reduced.

Data in the lower section will be the same as they are in the above section, not just "not set".

hvdwolf

I assume it has to do with the A* algorithm and the "shortest path" determination. And in this case a limitation in the number of paths to check.

tomas

@2highlander - what do you mean by 'curvy'?

@Oldie - resetting values will show default settings

Oldie

What are the default settings?

The ones I found, when I first entered the menu?

Or the ones I have now after tapping the reset button?

The values are definitely different!

Oldie

This is default after first opening of the menue (on my phone):

And this is default after resetting (on my tablet):

tomas

when you click reset you will get default values

values are rembered until you change them

2highlander

@Tomas
With curvy I mean whether navigation will head on as straight as possible or preferring curves. These settings could be interesting for bikers.

2highlander

@oldie
When resetting, my installation reacts exactly like Yours on both phones s5 and s9+

tomas

no, it is not for scenic routes

if you start with default vehicle settings and go to advanced, then you will all values marked as Not set, not what you see in Oldie's first screenshot

Oldie

So when does Navigator change the values to those I found in the above sections? It is for sure, that I did not change them manually!

tomas

you could have done by editing vehicle_profiles.xml

there is no other explanation

you can try to delete it, start Navigator and go to advanced settings

2highlander

Tomas, definitely no. When fiddling around in the wild area, there is no hint that the parameters in the advanced menu belong to a certain profile. Me thinks these are common parameters for all profiles.

First section shows 100.000, 250.000 m, 60 km/h, second section all 3 parameters show 'not set' when having opened advanced menu for the first time. After tapping the reset button all fields of both sections show the same numbers as seen on oldie's 2nd screenshot and these numbers are kept after having closed and opened the expansion menu again.

I have some additional profiles running but never edited vehicles.xml manually.

Resetting doesn't seem to hurt though. I played around a bit after resetting and didn't notice any difference.

tomas

did you delete file vehicle_profiles.xml?

2highlander

Errr, no. Why should I?

tomas

to see that what I say is what it shows

JambaFee

On my clean installation the extended option at the first call looks like this:

After hitting “reset all limits”:

When changing values for a certain profile there’s no matter what profile I activate then, the extended values always seem to be the one that were changed last. But when looking at the file "vehicle_profiles.xml" the values are indeed set correctly. So it looks as if this extended function is not implemented correctly. The question is, if the values from the extended display are used for calculation or the ones from vehicle_profiles.xml.

I have changed my daily used profiles to the values expansion limit = 500000 and distance limit to 1000 km and with this settings at least the route from my first post is calculated correctly. Calculation time is recognisable longer but still acceptable and is worth the fact that in this way I get the right route. Wrong route calculation, especially when causing a detour of 50 %, is a total No-Go.

It would be interesting if there is a way to find out how many links are used for a calculation to have an idea of how to set the expansion limit value.

tomas

firstly distance is from each waypoint, so 1000km journey ith departure and destination only needs just 500000 in distance settings (may be a little more just to make sure)

changed values are written to vehicle_profiles.xml, please look at sections <limit_meters> and <limit_expansion>

2highlander

I use MFN for biking. Especially when having small city roads switched off, I sometimes had very odd route calculations. As a consequence, I never switch off roads I do NOT want to drive completely but pull the priority value down to 10 or 1. Done so with highways and small city roads for example.

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