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Our administrators install OSRM v5. I try build the shortest route. uri: /route/v1/driving/50.792940,61.659061;50.798636,61.665437;50.811901,61.669517;50.768080,61.730977 server return faster route (about 11,5 km) and i can`t find how build shortest route (aboute 10 km).

Can i do this by options in request string or need change config on server. Or it is not possible.

thank you in advancealt text

asked 26 Apr '17, 13:31

Alex%20taxi21's gravatar image

Alex taxi21
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accept rate: 0%

edited 26 Apr '17, 15:02

escada's gravatar image

escada
18.9k16160301

Thank you for your responses )

It is a pity that can not just ask the OSRM option in the query to build the shortest route (

(27 Apr '17, 14:18) Alex taxi21

To get the shortest route, you will need to create a custom profile (a .lua file) where all roads are weighted at the same speed. The routing algorithm will then choose a 5-mile unclassified road (at 60mph) in preference to a 6-mile trunk road (at 60mph), whereas the standard car.lua will choose a 6-mile trunk road at 60mph in preference to a 5-mile unclassified road at 40mph.

You will need to specify the path to your profile in the command line when calling osrm-extract. I would recommend starting with car.lua and modifying it rather than creating a new profile from scratch.

As Andy has mentioned, I gave a brief overview of OSRM's profiles at https://help.openstreetmap.org/questions/30272/how-the-routing-osrm-algorithm-works .

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answered 27 Apr '17, 08:53

Richard's gravatar image

Richard ♦
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accept rate: 19%

Note: this is not from first hand experience.

OSRM always only has one profile per instance, at least when it is run in normal CH mode. And, as far as I know, the standard setup optimizes drive time, not distance. In other words you would have to set up an instance that uses the travelled distance as the metric (which I assume is possible, bat may be not easy).

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answered 26 Apr '17, 21:45

SimonPoole's gravatar image

SimonPoole ♦
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accept rate: 19%

Can you tell more about travelled distance as the metric? I tried build alternative routes by options, but OSRM always build only that route for points like in picture

(27 Apr '17, 07:51) Alex taxi21

This works https://www.openstreetmap.org/directions?engine=osrm_car&route=61.7141%2C50.7956%3B61.6808%2C50.8076#map=12/61.6972/50.8332

but if i extend the route south a small amount https://www.openstreetmap.org/directions?engine=osrm_car&route=61.7141%2C50.7956%3B61.6759%2C50.8092#map=12/61.6951/50.8095 the route takes the detour you have found. The obvious route your dotted one as a 60kph speed limit mapped the used alternative as no limit set. Maybe osrm calculates that as slower because of the 60kph

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answered 27 Apr '17, 08:26

andy%20mackey's gravatar image

andy mackey
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accept rate: 4%

edited 27 Apr '17, 08:29

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question asked: 26 Apr '17, 13:31

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last updated: 27 Apr '17, 14:35

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