fixed nan coordinates in maps

rowers/interactiveplots.py

@@ -820,6 +820,8 @@ def leaflet_chart2(lat,lon,name=""):
 
     df = df.replace(0,np.nan)
     df = df.loc[(df!=0).any(axis=1)]
+    df.fillna(method='bfill',axis=0,inplace=True)
+    df.fillna(method='ffill',axis=0,inplace=True)
     lat = df['lat']
     lon = df['lon']
     if lat.empty or lon.empty: