[OSM-talk] Routing Applications

[Florian Lohoff]

On Wed, Jun 17, 2015 at 09:00:37AM +0000, Janko Mihelić wrote:
> If you ask me, they are all in their infancy. Non of these routing services
> even route right. In a turn restriction the "via" role can be a way.
> Neither OSRM, ORS or GraphHopper knows how to restrict that, and that's
> IMHO one of the crucial parts of a routing engine.
> 
> When one of them starts routing right, than we can talk about picking a
> winner service. Right now only MapQuest knows how to route.

There is no such thing as a perfect routing engine. Every engine can be
brought to its knees with some cluefully choosen endpoints.

I am thankfull that we have the multitude of routing engines. At work
i am using OSRM for calculating distance for telecoms infrastructure for
which i am tuning the OSM dataset and calculate like 500K routes in a
couple of minutes.

On the mobile i am switching between OSMand and Mapfactor Navigator, but
all of them refuse to route into a track even if its grade2 and your
destination is at that track -> FAIL.

Routing home from work with mapquest gives me a route which is not that
bad but can be beaten by 20% less travel time from a local. Thats just
because everybody in this town knows that certain traffic lights are
synced in a tricky manner. You cant put this into OSM.

When looking at the bike route the route of mapquest is 1.5miles longer
(4.6 -> 6.2miles) than the Car route although there are cycle tracks in
the map along ALL roads taken. There is even a shorter route using tracks
in the wood but mapquest does not use them for bikes it seems.

So a quick test with carefully chosen endpoints produces less then
optimal solutions for ANY routing engine.

Flo
-- 
Florian Lohoff                                                 f at zz.de
     We need to self-defense - GnuPG/PGP enable your email today!
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