What is covering the ground?
The pavement is covering the ground.
    src        edge_attr  dst
0     0   to the left of   10
1     0  to the right of   14
2     1  to the right of   22
3     1  to the right of   14
4     1  to the right of   15
..  ...              ...  ...
86   22   to the left of    1
87   22  to the right of   13
88   22   to the left of    9
89   22   to the left of   17
90   22   to the left of   14

[91 rows x 3 columns]