-1, -1, 0
0, -1, 0
-1, 0, 0
0, 0, 0
-2, -1, 0
1, -1, 0
-2, 0, 0
1, 0, 0
-3, -1, 0
2, -1, 0
-3, 0, 0
2, 0, 0
+-
Leaflet | Grid Layer