Routing issue, Højby Denmark

elgaard commented 4 years ago

Using offline maps, Dec 1. 2019, but also many older maps. routing profile: car Osmand 3.5.5

hojby

The obvious route is through "Tværvej"

OSRM and Grasshopper finds the best route: https://www.openstreetmap.org/directions?engine=fossgis_osrm_car&route=55.90945%2C11.58998%3B55.91348%2C11.59373#map=17/55.91148/11.59184

elgaard commented 4 years ago

Selecting "fuel-efficent way" does make Osmand find the shorter way, 376m insted of 512m

I have changed Tværvej from residential to unclassified. The Danish name does indicate that it is more of a shortcut than a residential road.

This may help Osmand when new maps become available.

hvdwolf commented 4 years ago

You should not have done this. Those streets (also the ones around it) are tagged residential for a reason: because they are residential. Simply because OsmAnds priority mechanism for streets did not do the correct thing, you change an OSM street parameter that works for any navi app to something that OsmAnd can handle. You insert incorrect data into OSM to correct a routing bug in OsmAnd (I quickly checked Magic Earth and that one routes correct as well). Someone did some extensive tagging on all those roads to give them all the correct tag. Never change the map to suit a bug in one navi app (That is a golden rule). I also know what "tvaer" mentions in Danish, but that is not a good argument to change that street parameter. Please reverse it.

To add to this: I understand that you are willing to help to improve "things" in OSM, but please not like this ;). I hope this does not prevent you from further updates.

elgaard commented 4 years ago

I did not change it just to help Osmand routing (and I do not know if it will make a difference for Osmand routing). It is road that I travel regularly and looking at it again I assessed that it us more than a residential road. It is a natural way to travel north/south through Højby.

There are residential homes on Tværvej. But there are also residential homes on Lyngvej and Højby Hovedgade tagged as tertiary. Klokkelyngen is tagged as unclassified.

vshcherb commented 4 years ago

It is a question of some attributes of https://www.openstreetmap.org/way/107138388 (unclassified), we treat it with 20% penalty comparing to tertiary and it is why it is causing the trouble. It is probably bad in that situation but it is better in other parts of the world. Sorry I don't see a solution for now

        <select value="0.9" t="highway" v="tertiary"/>
        <select value="0.85" t="highway" v="tertiary_link"/>
        <!-- lowest form of grid network, usually 90% of urban roads -->
        <select value="0.7" t="highway" v="unclassified"/>

Zero3 commented 3 years ago

@elgaard Yes, the default OsmAnd routing config does weird stuff like this. See this related comment I just made in another GitHub issue about the same problem: https://github.com/osmandapp/OsmAnd/issues/2625#issuecomment-904131236. My work-in-progress routing.xml for Denmark that I mentioned finds the "correct" route through Tværvej, so it is indeed a routing.xml issue.

scaidermern commented 3 years ago

I did not change it just to help Osmand routing (and I do not know if it will make a difference for Osmand routing). It is road that I travel regularly and looking at it again I assessed that it us more than a residential road. It is a natural way to travel north/south through Højby.

Then you should use tertiary, not unclassified. Converting a road from residential to unclassified doesn't raise its importance.

osmandapp / OsmAnd

Routing issue, Højby Denmark #8152