Offline navigation - GraphHopper - preparation

[Bucky Kid]

Is it somehow possible to generate single custom .pbf file based on own region in order to seamlessly cross the borders?

[develar]

> generate single custom .pbf file based on own region in order to seamlessly cross the borders?

You can specify required for you countries and I will add specified region to https://graphhopper.develar.org

In general, you need to draw wanted region using http://geojson.io, download europe.pbf from some public  source (http://download.geofabrik.de/index.html),  and then

```
osmium extract --overwrite --config=extracts.json --strategy=smart europe-latest.osm.pbf
```

where extracts.json something like https://github.com/develar/gh-routing-data/blob/master/configs/extracts.json

and then build graph for result pbf file.

Since Locus is so awesome, I think it is not good that users need to do such low-level tasks to enjoy offline navigation, that's why I suggest you to file issue to https://github.com/develar/gh-routing-data/issues and I will add wanted region to provided list (main problem not first import, but keep it up to date).

[menion]

@develar
firstly, really nice work. I'm sure, many users appreciate it.

Just published version 0.7 of GH add-on.
Main change: using latest stable GH API 0.10

[Bucky Kid]

@menion: I can't find the updated version, is it still here?
https://nas.asamm.com/share.cgi?ssid=0GmHJnN

@develar: thanks for the method, my region is specific and not aligned exactly on country borders, so there will be probably a small target, and I use different set of wehicles

[develar]

@Bucky Kid Latest release on GitHub https://github.com/asamm/locus-addon-graphhopper/releases/latest

[menion]

Ah thanks, I've updated the first post and hope it is ok for you @develar, that I pointed users directly on your web server.

[Bucky Kid]

Thanks develar for updated link, do you know where to get Windows binaries for osmium tool?
I am unable to compile from sources.

[develar]

@Bucky Kid Please see https://ci.appveyor.com/api/buildjobs/skx61j610842y80u/artifacts/osmium_Release_x64.zip

Issue https://github.com/osmcode/osmium-tool/issues/59 is opened. I don't test it (I use macOS).

> I am unable to compile from sources.

Process is not easy. That's why I created http://graphhopper.develar.org/ and any user can request any region to be added to avoid low-level things.

[Bucky Kid]

osmium extract --overwrite --config=extracts.json --strategy=smart europe-latest.osm.pbf

Finally got everything to work, but this is not working, instead I had to uise

osmium extract --polygon extracts.json ....

or also works

osmium merge -o my-europe.osm.pbf country1-latest.osm.pbf country2-latest.osm.pbf country3-latest.osm.pbf ...

however anyway I brush up against problem of memory limitation so wasn't able to generate combined routing data even only for 3 countries, so seamless routing will only be possible by adding support for automatic region selection in graphopper app.

[develar]

@Bucky Kid

> however anyway I brush up against problem of memory limitation so wasn't able to generate combined routing data even only for 3 countries, so seamless routing will only be possible by adding support for automatic region selection in graphopper app.

`export JAVA_OPTS="-Xmx15g -Xms10g -XX:+UseG1GC"`

where `15g` it is `available RAM - 1GB` (1GB for system). Change `-Xms10g`  if you don't have 10GB.

and if your machine doesn't have enough memory (estimate: num of encoders * size of input map), use MMAP instead of RAM_STORE.

Or you can stop wasting your time and file issue to https://github.com/develar/gh-routing-data/issues/new

[develar]

About memory on mobile — Locus add-on correctly set MMAP instead of RAM_STORE. It works very fast because provided graphs by http://graphhopper.develar.org/ are sorted. Yes, there is penalty, but insignificant — you can build europe wide route (900 km) in _several seconds_. The only downside of large regions — disk space (e.g. de-at-ch takes 5GB). But SD cards are cheap nowadays

[Bucky Kid]

Thanks for all the input. Combined region now compiles successfully. There remains one issue and that is when I use sorting (graph.do_sort), the compilation ends up with error

Code: [Select]

Exception in thread "main" java.lang.AssertionError: The turn cost storage must be initialized only once.
        at com.graphhopper.storage.TurnCostExtension.init(TurnCostExtension.java:60)
        at com.graphhopper.storage.BaseGraph.<init>(BaseGraph.java:144)
        at com.graphhopper.storage.GraphHopperStorage.<init>(GraphHopperStorage.java:83)
        at com.graphhopper.util.GHUtility.newStorage(GHUtility.java:281)
        at com.graphhopper.GraphHopper.postProcessing(GraphHopper.java:854)
        at com.graphhopper.GraphHopper.process(GraphHopper.java:671)
        at com.graphhopper.GraphHopper.importOrLoad(GraphHopper.java:640)
        at com.graphhopper.tools.Import.main(Import.java:50)
If I turn off turncosts for calculation, the sorted data compile, so the two features probably cannot be used concurrently

[develar]

You cannot use turn costs for now. https://github.com/graphhopper/graphhopper/issues/1401 I didn’t yet publish PR to Locus add-on.

[Andy Tover]

Is the GraphHopper offline routing "project" dead? None of the links on develar.org for any of the routing files work. Any other options for offline routing at this point besides BRouter?

[menion]

Hello,
should not be, To be true, do not know why data from @develar server are not downloadable anymore.

You still may download add-on's APK and compile routing data on your own.