Despg Extension using GraphHopper for Route Calculation

Despg

Discrete Event Simulation Playground

This project is licensed under the Eclipse Public License 2.0.

Website: despg.dev

Was ist despg?

get started

onboarding

GraphHopper is a fast and memory-efficient routing engine released under Apache License 2.0. It can be used as a
Java library or standalone web server to calculate the distance, time, turn-by-turn instructions and many road
attributes for a route between two or more points. Beyond this "A-to-B" routing it supports "snap to road", Isochrone
calculation, mobile navigation and more. GraphHopper uses OpenStreetMap and GTFS data by default and it can
import other data sources too.

Installation

Make sure to use at least Java 8 and higher.
Follow the Link https://download.geofabrik.de/europe/germany-latest.osm.pbf to download the newest osm.pbf File of your Germany
Replace the File Path inside the Class Routing.java to your Local File Path.

hopper.setOSMFile("" + "your_local_file_path.osm.pbf");

Replace the Cache File Path inside the Class Routing.java to your Local Cache File Path.

hopper.setGraphHopperLocation("your_cache_path");

VM - Arguments

Use at least 5Gb RAM
Disclaimer, when first executing it may take a while until the Map is fully loaded.

-Xmx5g -Xms5g

Library

Follow the Link to download the GraphHopper Jar
Create a new User Library inside your Java Project
Add the User Library to your Java Project

Server - Setup

Disclaimer, when first executing it may take a while until the Map is fully loaded.
Download the config.yml.
Change the Parameter datareader.file to your_local_file_path.osm.pbf

graphhopper:
 
  datareader.file: your_local_file_path.osm.pbf

To Start the Server use the following Command inside the Terminal

java -Xmx5g -Xms5g -jar your_local_file_path_of_the_graphhopper.jar server your_local_file_path_of_the_config.yml