import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
+import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.wamblee.gps.geometry.ReferenceCoordinateSystem;
import org.wamblee.gps.track.Track;
-public class TrackStatistics {
+public class TrackStatistics implements Serializable {
private Track _track;