title: How to do a gps map-matching with graphhopper for a bicycle-track
body: <p>I need to match gps-tracks recorded by bicycle to openstreetmap. For this I use the <a href="https://github.com/karussell/map-matching" rel="nofollow">map-matching</a> extension for graphhopper. The routing default is for car, however there is a parameter <code>vehicle=</code></p>
  
  <p>I tried
  <code>./map-matching.sh action=import datasource=./map-data/*.osm.pbf vehicle=bike</code></p>
  
  <p>and got the error</p>
  
  <pre><code>Exception in thread "main" java.lang.IllegalStateException: Encoding does not match:
  Graphhopper config: bike|speedFactor=2.0|speedBits=4|turnCosts=false
  Graph: car|speedFactor=5.0|speedBits=5|turnCosts=false, dir:./graph-cache/
          at com.graphhopper.storage.GraphHopperStorage.loadExisting(GraphHopperStorage.java:1410)
          at com.graphhopper.GraphHopper.load(GraphHopper.java:757)
          at com.graphhopper.GraphHopper.importOrLoad(GraphHopper.java:601)
          at com.graphhopper.matching.MapMatchingMain.start(MapMatchingMain.java:56)
          at com.graphhopper.matching.MapMatchingMain.main(MapMatchingMain.java:38)
  </code></pre>
  
  <p>What does this error mean? For car it worked without any problems:</p>
  
  <p><code>./map-matching.sh action=import datasource=./map-data/*.osm.pbf vehicle=car</code></p>
  
  <pre><code>2015-04-30 10:29:37,624 [main] INFO  com.graphhopper.GraphHopper - version 0.5|2015-04-22T18:00:26+0000 (4,12,3,2,2)
  2015-04-30 10:29:37,641 [main] INFO  com.graphhopper.GraphHopper - graph GraphHopperStorage|car|RAM_STORE|2D|NoExt|4,12,3,2,2,
  details:edges:1 024 914(32), nodes:833 438(10), name: /(3), geo:7 254 610(28),
  bounds:5.95087757596845,10.511746492499407,45.81184228834157,47.811018254109136
  </code></pre>
  
  <p>My system</p>
  
  <pre><code>&gt; mvn --version
  Apache Maven 2.2.1 (rdebian-15)
  Java version: 1.7.0_79
  Java home: /usr/lib/jvm/java-7-openjdk-amd64/jre
  Default locale: de_CH, platform encoding: UTF-8
  OS name: "linux" version: "3.16.0-34-generic" arch: "amd64" Family: "unix"
  </code></pre>