code: private static ISeq<WayPoint> districtCapitals() throws IOException {
  		final String capitals = "/io/jenetics/example/DistrictCapitals.gpx";
  		try (InputStream in = TravelingSalesman
  				.class.getResourceAsStream(capitals))
  		{
  			return ISeq.of(GPX.read(in).getWayPoints());
  		}
  	}
docs: Return the district capitals, we want to visit.