How to use properties file from Routing? graph.ch.weightings: [] is not equal to loaded [fastest|car]

Open Source Routing Engine Map Matching
1

There are some differences between OSM files for " Map Matching " and " Routing "

“Map Matching” doesn’t work with files of Routing

For “Map Matching”:

java -jar matching-web/target/graphhopper-map-matching-web-*.jar import *.osm.pbf

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For “Routing”:

./graphhopper.sh -a import -i

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So there are some differences in proporties file

When I use properties file form Routing for MapMathing I get the next error:

 java.lang.IllegalStateException: Configured graph.ch.weightings: [] is not equal to loaded [fastest|car]
     at com.graphhopper.storage.GraphHopperStorage.loadExisting(GraphHopperStorage.java:254)
     at com.graphhopper.GraphHopper.load(GraphHopper.java:781)
     at com.graphhopper.matching.MatchCommand.<init>(MatchCommand.java:45)
     at com.example.gpstrack.Map.onConnected(Map.java:811)

In my app I want to use routing and map matching at the same time and use the same files

It seems I need two instance of Graphhopper anyway:

    graphHopperRouting.load("*/graphhopper/country-gh");

    graphHopperMapMatching.getCHFactoryDecorator().setEnabled(false);
    graphHopperMapMatching.load(("*/graphhopper/country-gh");

But how to init the same files? If could init different proporties files, something like this:

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But I believe default constructor of Graphhopper class won’t allow such manipulations, it expects path to the folder

2

Any feedback?

3

You need to make sure that you are using the same configuration for e.g. prepare.ch.weightings

4

I mean there is no problem using two different folders: one for MapMatching and another one for Routing, with their own properties file it works fine

But I want to use only one folder, because files like “edge”, “geometry”, “location_index”, “names”, “nodes” are the same, only properties differs

Many phones don’t have a lot of storage memory

5

You can change the properties file to your needs. This is the “configuration file”.

6

I understand, but how to make one universal properties file which will work for MapMatching and for Routing at the same time, what can I change to make it work for both APIs?

7

Or I just can dynamically copy proporties files to that folder

For e.g. when App starts it copies first properties file to *gh folder (where “edge”, “geometry”, “location_index”, “names”, “nodes” are placed) and loads one instance of GraphHopper for Routing
after that app deletes that properties file, copies another properties file to *gh folder and loads another instance of GraphHopper for MapMatching

8

As noted above:

When both graphs are created with the same properties you can use them for routing and map matching.

9

Well what does same configuration/properties mean? How to implement it, any examples?

What I did:

  1. downloaded osm.pbf file
  2. convert it with ./graphhopper.sh -a import map.osm.pbf
  3. convert it with java -jar matching-web/target/graphhopper-map-matching-web-*.jar import map.osm.pbf
  4. now I have two folders, one works for Routing and another one works for MapMatching
10

I also have this problem, have you solved this problem ?

11

no, GraphHopper’s “load” method expects path to folder, so the only way is to use the next crutch:

Dynamically copy properties files to that folder:
For e.g. when App starts it copies first properties file to *gh folder (where “edge”, “geometry”, “location_index”, “names”, “nodes” are placed) and loads one instance of GraphHopper for Routing
after that app deletes that properties file, copies another properties file to *gh folder and loads another instance of GraphHopper for MapMatching