What is the picture showing?
It is showing a lake.
    src        edge_attr  dst
0     1  to the right of    8
1     1   to the left of    4
2     1   to the left of    3
3     1  to the right of   10
4     2  to the right of   15
5     2   to the left of    4
6     2   to the left of    3
7     2  to the right of   10
8     2  to the right of   13
9     3  to the right of    2
10    3  to the right of   15
11    3  to the right of    1
12    3   to the left of    5
13    3   to the left of    4
14    3  to the right of   13
15    3   to the left of    6
16    4  to the right of    3
17    4  to the right of    2
18    4  to the right of    1
19    4  to the right of   13
20    4  to the right of   15
21    4  to the right of   14
22    5   to the left of    6
23    5  to the right of    3
24    6  to the right of    3
25    6  to the right of    5
26    8   to the left of    1
27    8   to the left of   14
28    8   to the left of    9
29    9  to the right of    8
30    9               on    0
31    9  to the right of   11
32    9   to the left of   12
33   10   to the left of    1
34   10   to the left of    2
35   10   to the left of   14
36   10   to the left of   13
37   10   to the left of   15
38   11   to the left of   14
39   11   to the left of    9
40   11               on    0
41   12  to the right of    9
42   12  to the right of   14
43   13  to the right of   10
44   13   to the left of    4
45   13   to the left of    3
46   13   to the left of    2
47   14  to the right of   11
48   14   to the left of   12
49   14  to the right of   10
50   14  to the right of    8
51   14   to the left of    4
52   15  to the right of   10
53   15   to the left of    3
54   15   to the left of    4
55   15   to the left of    2