def METHOD_NAME():
    # Four nodes arranged at the corners of a 200x200 square with one node
    # at the center
    nodes_df = pd.DataFrame({'id': np.arange(5),
                             'x': [0., -100., 100., -100., 100.],
                             'y': [0., 100., 100., -100., -100.]})
    return nodes_df.set_index('id')