diff --git a/rowers/views/workoutviews.py b/rowers/views/workoutviews.py
index 7da9c086..8ece34b7 100644
--- a/rowers/views/workoutviews.py
+++ b/rowers/views/workoutviews.py
@@ -2411,9 +2411,15 @@ def workout_view(request,id=0,raceresult=0,sessionresult=0):
 
 
     if hascoordinates:
-        mapscript,mapdiv = leaflet_chart(rowdata.df[' latitude'],
-                                         rowdata.df[' longitude'],
-                                         row.name)
+        if intervaldata:
+            rowdata.df['reltime'] = rowdata.df['TimeStamp (sec)']-rowdata.df.loc[0,'TimeStamp (sec)']
+            mask = (rowdata.df['reltime']>startsecond) & (rowdata.df['reltime']<endsecond)
+            latitudes = rowdata.df.loc[mask,' latitude']
+            longitudes = rowdata.df.loc[mask,' longitude']
+        else:
+            latitudes = rowdata.df[' latitude']
+            longitudes = rowdata.df[' longitude']
+        mapscript,mapdiv = leaflet_chart(latitudes,longitudes,row.name,)
 
 
     else: