void vik_track_convert ( VikTrack *tr, VikCoordMode dest_mode );
gdouble *vik_track_make_elevation_map ( const VikTrack *tr, guint16 num_chunks );
void vik_track_get_total_elevation_gain(const VikTrack *tr, gdouble *up, gdouble *down);
-VikCoord *vik_track_get_closest_tp_by_percentage_dist ( VikTrack *tr, gdouble reldist );
+VikTrackpoint *vik_track_get_closest_tp_by_percentage_dist ( VikTrack *tr, gdouble reldist );
gdouble *vik_track_make_speed_map ( const VikTrack *tr, guint16 num_chunks );
gboolean vik_track_get_minmax_alt ( const VikTrack *tr, gdouble *min_alt, gdouble *max_alt );
void vik_track_marshall ( VikTrack *tr, guint8 **data, guint *len);