X-Git-Url: https://git.street.me.uk/andy/viking.git/blobdiff_plain/5a9cffb11d58c725f425828c09c814d1139bbae1..4a050412da32aa6f237c358cfa0c5a3775f21e9a:/src/viktrack.c?ds=sidebyside

diff --git a/src/viktrack.c b/src/viktrack.c
index 2a02b1e4..6eb685ad 100644
--- a/src/viktrack.c
+++ b/src/viktrack.c
@@ -412,7 +412,8 @@ gdouble *vik_track_make_elevation_map ( const VikTrack *tr, guint16 num_chunks )
        **/
 
       if ( ignore_it )
-        pts[current_chunk] = VIK_DEFAULT_ALTITUDE;
+	// Seemly can't determine average for this section - so use last known good value (much better than just sticking in zero)
+        pts[current_chunk] = altitude1;
       else
         pts[current_chunk] = altitude1 + (altitude2-altitude1)*((dist_along_seg - (chunk_length/2))/current_seg_length);
 
@@ -1066,6 +1067,20 @@ void vik_track_apply_dem_data ( VikTrack *tr )
   }
 }
 
+/*
+ * Apply DEM data (if available) - to only the last trackpoint
+ */
+void vik_track_apply_dem_data_last_trackpoint ( VikTrack *tr )
+{
+  gint16 elev;
+  if ( tr->trackpoints ) {
+    /* As in vik_track_apply_dem_data above - use 'best' interpolation method */
+    elev = a_dems_get_elev_by_coord ( &(VIK_TRACKPOINT(g_list_last(tr->trackpoints)->data)->coord), VIK_DEM_INTERPOL_BEST );
+    if ( elev != VIK_DEM_INVALID_ELEVATION )
+      VIK_TRACKPOINT(g_list_last(tr->trackpoints)->data)->altitude = elev;
+  }
+}
+
 /* appends t2 to t1, leaving t2 with no trackpoints */
 void vik_track_steal_and_append_trackpoints ( VikTrack *t1, VikTrack *t2 )
 {
@@ -1081,9 +1096,8 @@ 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 the new end of the track (or the start if
- * there are no double points
+ * If there is no double point, deletes all the trackpoints.
+ * Returns the new end of the track (or the start if there are no double points)
  */
 VikCoord *vik_track_cut_back_to_double_point ( VikTrack *tr )
 {