Update app.py

app.py

@@ -96,8 +96,11 @@ def extract_vertices(gdf):
                     all_data2.append(pd.DataFrame({'Lat': y, 'Lon': x}))
                 df = pd.concat(all_data2)
             except:
-                df = pd.DataFrame({'Lat': [np.nan],
-                                   'Lon': [np.nan], })
+                for i in g.geometry:
+                    x=np.concatenate([poly.exterior.coords.xy[0] for poly in i.geoms])
+                    y=np.concatenate([poly.exterior.coords.xy[1] for poly in i.geoms])
+                df = pd.DataFrame({'Lat': y,
+                                   'Lon': x, })
         df['index_gdf'] = i
         all_data.append(df)
     return pd.concat(all_data).query('Lat==Lat').reset_index(drop=1).drop(columns='index_gdf')