Line source. Granite. Mean field. Goff.
P N s g O 
100 0
2
0 1500 0 0 0 1 0
0 5000 2000 0.1 0.2 3.0  1. 
-100
-100 -2 50

1200 -1200
2000 100 1901 0
512 50 150 0.001 0 0.5 3