fix

rowers/dataroutines.py

@@ -249,8 +249,7 @@ def get_video_data(w, groups=['basic'], mode='water'):
     df2 = pd.concat([df2, coordinates], axis=1)
     latitude = df2['latitude']
     longitude = df2['longitude']
-    boatspeed = (100*df2['velo']).astype(int)/100.
-
+    boatspeed = (100*df2['velo'].fillna(method='ffill')).astype(int)/100.
     # bundle data
     data = {
         'boatspeed': boatspeed.values.tolist(),