You need have a input hgrid.old
Put all DEM files in DEM under current folder.
1 cd DEM, run sym*_part1.pl.
2 cd ../
3 ln -sf DEM/dem_*.asc .
4 edit dems.in, the first number is the total number of dem_*.asc
the second number is the total nodes you want to use.
5 submit run_james
6 mv hgrid.new hgrid.old
7 then repeat step 1 with sym*_part2.pl
8 repeat steps from 2-5
9 your hgrid.new will be the final one with all DEMs loaded.

