north: 220542
south: 220528
east: 638492
west: 638478
rows: 7
cols: 7
3 2 5 3 5 3 4 
1 4 5 5 5 * 4 
2 1 * 3 5 5 2 
4 2 4 4 4 5 4 
4 4 2 * 5 2 4 
1 2 1 1 2 2 2 
5 4 1 2 3 4 2