+void vik_track_marshall ( VikTrack *tr, guint8 **data, guint *len);
+VikTrack *vik_track_unmarshall (guint8 *data, guint datalen);
+
+void vik_track_apply_dem_data ( VikTrack *tr);
+
+/* appends t2 to t1, leaving t2 with no trackpoints */
+void vik_track_steal_and_append_trackpoints ( VikTrack *t1, VikTrack *t2 );
+
+/* starting at the end, looks backwards for the last "double point", a duplicate trackpoint.
+ * this is indicative of magic scissors continued use. If there is no double point,
+ * deletes all the trackpoints. returns new end of the track (or the start if
+ * there are no double points)
+ */
+VikCoord *vik_track_cut_back_to_double_point ( VikTrack *tr );
+
+void vik_track_set_property_dialog(VikTrack *tr, GtkWidget *dialog);
+void vik_track_clear_property_dialog(VikTrack *tr);