What profile to use with custom models

[jostwald]

Hi, I’m connecting to graphhopper using the java client located here
implementation ‘com.graphhopper:directions-api-client-hc:5.3’

I’m trying to use polygon-based vehicle profiles as described here

Examples For Customizable Routing - GraphHopper Directions API

I’ve built a CustomModel and I’m passing it in to request.setCustomModel, but I’m getting an error telling me I have to set the profile. Is there a special token that means “go use the custom model”? Or do I somehow associate a name with the model?
When I was routing client side, I could associate it by building a CustomProfile, but I don’t seem to have access to that class in the client library.

Please advise
Thanks

[easbar]

Yes, every custom model is based on some profile. Currently, you can use car,small_truck,scooter,foot or bike. For example if you use profile: car and setup a rule in your custom model that does multiply_by: 0.8 for speed, 80% of the normal car speed will be used for the affected roads.

[jostwald]

Okay, thanks.

So if I set it to “car” I get the following error:
“The requested profile ‘car’ cannot be used with custom_model, because it has weighting=fastest”

Do I have to do something to override the default weighting of “car”?

This is my profile btw, which is copied straight off the examples link

{
“priority”: [{
“if”: “road_class == MOTORWAY && in_near_cottbus == false”,
“multiply_by”: 0
}],
“areas”: {
“near_cottbus”: {
“type”: “Feature”,
“properties”: {},
“geometry”: {
“type”: “Polygon”,
“coordinates”: [[
[ 13.84826, 51.6137 ],
[ 13.9746, 51.61375 ],
[ 13.97323, 51.82983 ],
[ 13.84963, 51.83323 ],
[ 13.84826, 51.6137 ]
]]
}
}
}
}

[easbar]

This is your custom model. What does your request look like? And are you querying against graphhopper.com/api/1/route or do you run your own GraphHopper server?

[jostwald]

I’m running my own server (it’s 4.0 with no changes). My request looks like this (I’m using the java client)

GHRequest request = new GHRequest(start.getLatitude(), start.getLongitude(),
end.getLatitude(), end.getLongitude());
request.putHint(“instructions”, false);
request.putHint(“ch.disable”, true);
request.setCustomModel(customModel);
request.setProfile(“car”);

[easbar]

@jostwald

I’m running my own server (it’s 4.0 with no changes)

To use custom models you need to set up at least one custom profile. In your config.yml file:

profiles:
  - name: abc
    weighting: custom
    vehicle: car
    custom_model_file: empty

And then use profile=abc in your request. This is all written here. Did you not read this or was it not clear?

[jostwald]

Yes, that is quite clear, thank you.

I read several guides, but apparently I didn’t read that one to the end.