What is the photo showing?
It is showing a lake.
   src        edge_attr  dst
0    0  to the right of    4
1    1               in    5
2    2   to the left of    8
3    3               by    5
4    4   to the left of    0
5    4   to the left of    8
6    8  to the right of    4
7    8  to the right of    2