ccwcol.col, ecol.col and g90col.col are used to check non-dimensional
quantities and so can be used for different applications. dcol.col and
a2dcol.col are used for checking depth and area/depth respectively, and
so need to be set up with breakpoint values appropriate to the problem
in hand. Program TriStats can be used to get a histogram of the area/
depth ratios for a given grid. The first number in each record in these
files is the integer code for one of 16 colours available with TriGrid:
0 - black 8 - dark grey
1 - white 9 - light grey
2 - red 10 - dark red
3 - green 11 - dark green
4 - blue 12 - dark blue
5 - yellow 13 - orange/mustard
6 - cyan 14 - dark cyan
7 - violet 15 - dark violet-blue
The second value in each record is the breakpoint value up to which the
corresponding colour applies.