north: 220542
south: 220528
east: 638492
west: 638478
rows: 7
cols: 7
2.5 3.5 4.5 5 5 4 * 
2 2.5 3.5 5 5 4.5 4 
2 3 4 4.5 5 4.5 4 
3 3 3 4 4.5 4 4 
3 2 2 3 3 4 3 
4 2 2 2 2 2 2 
3 1.5 1.5 1.5 2 2 2