Not every OSM region has width information

python_scripts/add_trees_to_open_street_map/export_OSM_roads_to_csv.py

@@ -35,7 +35,8 @@ def create_table(ways):
     df = df.rename(columns={'width': 'width [m]',
                             'maxspeed': 'maxspeed [km/h]'})
     for col in NUMERICAL_COLUMNS:
-        df[col] = pd.to_numeric(df[col])
+        if col in df.columns:
+            df[col] = pd.to_numeric(df[col])
     df = df.sort_values('length [m]', ascending=False)
     return df