diff --git a/rowers/interactiveplots.py b/rowers/interactiveplots.py
index ac99a831..aa884ea1 100644
--- a/rowers/interactiveplots.py
+++ b/rowers/interactiveplots.py
@@ -2069,6 +2069,52 @@ def leaflet_chart_compare(course,workoutids,labeldict={},startenddict={}):
     latmean,lonmean,coordinates = course_coord_center(course)
     lat_min, lat_max, long_min, long_max = course_coord_maxmin(course)
 
+    coordinates = course_spline(coordinates)
+
+
+
+    polygons = GeoPolygon.objects.filter(course=course).order_by("order_in_course")
+
+    plabels = ''
+
+    for p in polygons:
+        coords = polygon_coord_center(p)
+
+        plabels += """
+        var marker = L.marker([{latbegin}, {longbegin}]).addTo(mymap);
+        marker.bindPopup("<b>{name}</b>");
+
+        """.format(
+            latbegin = coords[0],
+            longbegin = coords[1],
+            name = p.name
+            )
+
+    pcoordinates = """[
+    """
+
+    for p in polygons:
+        pcoordinates += """[
+        ["""
+
+        points = GeoPoint.objects.filter(polygon=p).order_by("order_in_poly")
+
+        for pt in points:
+            pcoordinates += "[{x},{y}],".format(
+                x = pt.latitude,
+                y = pt.longitude
+                )
+
+        # remove last comma
+        pcoordinates = pcoordinates[:-1]
+        pcoordinates += """]
+        ],
+        """
+
+    pcoordinates += """
+    ]"""
+
+
     # Throw out 0,0
     df = df.replace(0,np.nan)
     df = df.loc[(df!=0).any(axis=1)]
@@ -2093,18 +2139,7 @@ def leaflet_chart_compare(course,workoutids,labeldict={},startenddict={}):
     except AttributeError:
         items = zip(workoutids,colors)
 
-    coordinates = zip(lat,lon)
 
-    scoordinates = "["
-
-    for x,y in coordinates:
-        scoordinates += """[{x},{y}],
-        """.format(
-            x=x,
-            y=y
-            )
-
-    scoordinates += "]"
 
     script = """
     <script>
@@ -2178,6 +2213,10 @@ def leaflet_chart_compare(course,workoutids,labeldict={},startenddict={}):
     }}).addTo(mymap);
 
 
+    var platlongs = {pcoordinates}
+    var polygons = L.polygon(platlongs, {{color:'blue'}}).addTo(mymap)
+
+    {plabels}
 
       """.format(
           latmean=latmean,
@@ -2186,7 +2225,8 @@ def leaflet_chart_compare(course,workoutids,labeldict={},startenddict={}):
           latend=latend,
           longbegin=longbegin,
           longend=longend,
-          scoordinates=scoordinates,
+          pcoordinates=pcoordinates,
+          plabels=plabels,
           )
 
     for id,color in items:
diff --git a/rowers/templates/mapcompare.html b/rowers/templates/mapcompare.html
index db678501..88a1db29 100644
--- a/rowers/templates/mapcompare.html
+++ b/rowers/templates/mapcompare.html
@@ -20,8 +20,8 @@
 <h1>Course Map Comparison</h1>
 
 <p>Click on a line to see the label. Double click on a line to remove it. Reload to get back all lines.</p>
-
-
+<p>We show your original GPS coordinates on the course. For course time, we use a finer interpolation, to get
+  the exact time when you crossed the line.</p>
 
     <div class="mapdiv">
       {{ mapdiv|safe }}