477 !NREC - number of nodes in file
9 !MAXNGH - maximum number of neighbours for any node in this file
10.480 13.470 0.440 0.350 !RANGES - xhigh yhigh xlow ylow - extreme values of x, y positions
1 1.570 13.470 1 0.00 2 204 126 0 0 0 0 0 0 !NODENO X Y CCODE DEP NEIGHBOURS(1..MAXNGH)
2 1.430 13.180 1 0.00 1 204 3 0 0 0 0 0 0
3 1.480 12.880 1 0.00 2 204 4 203 0 0 0 0 0
4 1.530 12.580 1 0.00 3 203 5 202 0 0 0 0 0
5 1.480 12.280 1 0.00 4 202 6 201 0 0 0 0 0
6 1.270 12.020 1 0.00 5 201 200 7 0 0 0 0 0
7 1.090 11.750 1 0.00 6 200 199 8 0 0 0 0 0
...
474 2.610 12.300 0 30.00 246 247 473 475 454 455 456 0 0
475 2.660 12.700 0 30.00 123 124 248 457 247 474 456 0 0
476 5.313 1.194 0 15.00 170 477 171 209 206 207 208 0 0
477 5.546 0.750 0 15.00 57 58 169 59 206 170 476 0 0