private void start(CmdArgs args) {
    String action = args.get("action", "").toLowerCase();
    args.put("graph.location", "./graph-cache");
    if (action.equals("import")) {
      String vehicle = args.get("vehicle", "car").toLowerCase();
      args.put("graph.flagEncoders", vehicle);
      args.put("osmreader.osm", args.get("datasource", ""));

      // standard should be to remove disconnected islands
      args.put("prepare.minNetworkSize", 200);
      args.put("prepare.minOneWayNetworkSize", 200);
      GraphHopper hopper = new GraphHopper().init(args);
      hopper.setCHEnable(false);
      hopper.importOrLoad();

    } else if (action.equals("match")) {
      GraphHopper hopper = new GraphHopper().init(args);
      hopper.setCHEnable(false);
      logger.info("loading graph from cache");
      hopper.load("./graph-cache");
      FlagEncoder firstEncoder = hopper.getEncodingManager().fetchEdgeEncoders().get(0);
      GraphHopperStorage graph = hopper.getGraphHopperStorage();

      int gpxAccuracy = args.getInt("gpxAccuracy", 15);
      String instructions = args.get("instructions", "");
      logger.info("Setup lookup index. Accuracy filter is at " + gpxAccuracy + "m");
      LocationIndexMatch locationIndex =
          new LocationIndexMatch(graph, (LocationIndexTree) hopper.getLocationIndex(), gpxAccuracy);
      MapMatching mapMatching = new MapMatching(graph, locationIndex, firstEncoder);
      mapMatching.setSeparatedSearchDistance(args.getInt("separatedSearchDistance", 500));
      mapMatching.setMaxNodesToVisit(args.getInt("maxNodesToVisit", 1000));
      mapMatching.setForceRepair(args.getBool("forceRepair", false));

      // do the actual matching, get the GPX entries from a file or via stream
      String gpxLocation = args.get("gpx", "");
      File[] files = getFiles(gpxLocation);

      logger.info("Now processing " + files.length + " files");
      StopWatch importSW = new StopWatch();
      StopWatch matchSW = new StopWatch();

      Translation tr = new TranslationMap().doImport().get(instructions);

      for (File gpxFile : files) {
        try {
          importSW.start();
          List<GPXEntry> inputGPXEntries =
              new GPXFile().doImport(gpxFile.getAbsolutePath()).getEntries();
          importSW.stop();
          matchSW.start();
          MatchResult mr = mapMatching.doWork(inputGPXEntries);
          matchSW.stop();
          System.out.println(gpxFile);
          System.out.println(
              "\tmatches:\t"
                  + mr.getEdgeMatches().size()
                  + ", gps entries:"
                  + inputGPXEntries.size());
          System.out.println(
              "\tgpx length:\t"
                  + (float) mr.getGpxEntriesLength()
                  + " vs "
                  + (float) mr.getMatchLength());
          System.out.println(
              "\tgpx time:\t"
                  + mr.getGpxEntriesMillis() / 1000f
                  + " vs "
                  + mr.getMatchMillis() / 1000f);

          String outFile = gpxFile.getAbsolutePath() + ".res.gpx";
          System.out.println("\texport results to:" + outFile);

          InstructionList il;
          if (instructions.isEmpty()) {
            il = new InstructionList(null);
          } else {
            AltResponse matchGHRsp = new AltResponse();
            Path path = mapMatching.calcPath(mr);
            new PathMerger().doWork(matchGHRsp, Collections.singletonList(path), tr);
            il = matchGHRsp.getInstructions();
          }

          new GPXFile(mr, il).doExport(outFile);
        } catch (Exception ex) {
          importSW.stop();
          matchSW.stop();
          logger.error("Problem with file " + gpxFile + " Error: " + ex.getMessage());
        }
      }
      System.out.println(
          "gps import took:" + importSW.getSeconds() + "s, match took: " + matchSW.getSeconds());

    } else if (action.equals("getbounds")) {
      String gpxLocation = args.get("gpx", "");
      File[] files = getFiles(gpxLocation);
      BBox bbox = BBox.createInverse(false);
      for (File gpxFile : files) {
        List<GPXEntry> inputGPXEntries =
            new GPXFile().doImport(gpxFile.getAbsolutePath()).getEntries();
        for (GPXEntry entry : inputGPXEntries) {
          if (entry.getLat() < bbox.minLat) {
            bbox.minLat = entry.getLat();
          }
          if (entry.getLat() > bbox.maxLat) {
            bbox.maxLat = entry.getLat();
          }
          if (entry.getLon() < bbox.minLon) {
            bbox.minLon = entry.getLon();
          }
          if (entry.getLon() > bbox.maxLon) {
            bbox.maxLon = entry.getLon();
          }
        }
      }

      System.out.println("max bounds: " + bbox);

      // show download only for small areas
      if (bbox.maxLat - bbox.minLat < 0.1 && bbox.maxLon - bbox.minLon < 0.1) {
        double delta = 0.01;
        System.out.println(
            "Get small areas via\n"
                + "wget -O extract.osm 'http://overpass-api.de/api/map?bbox="
                + (bbox.minLon - delta)
                + ","
                + (bbox.minLat - delta)
                + ","
                + (bbox.maxLon + delta)
                + ","
                + (bbox.maxLat + delta)
                + "'");
      }
    } else {
      System.out.println(
          "Usage: Do an import once, then do the matching\n"
              + "./map-matching action=import datasource=your.pbf\n"
              + "./map-matching action=match gpx=your.gpx\n"
              + "./map-matching action=match gpx=.*gpx\n\n"
              + "Or start in-built matching web service\n"
              + "./map-matching action=start-server\n\n");
    }
  }
 public static boolean isEqual(GPXEntry a, GPXEntry b) {
   return Math.abs(a.getLat() - b.getLat()) < 1e-4 && Math.abs(a.getLon() - b.getLon()) < 1e-4;
 }