DLINES indicates whether the direction of lines (order of points) should
be taken into consideration when performing a graph-to-grid contour
analysis. For instance, if only one contour line is drawn, the situation
is ambiguous as to which side of the line should have values greater (or
lesser) than the contour value. The convention is that GREATER VALUES ARE
ALWAYS TO THE RIGHT OF THE LINE. DLINES also indicates if the left-of-line
value is smaller. If the DISCRETE option is enabled, then DLINES is
automatically TRUE for right of line.
In cases where only like-valued contours exist (or a single contour), then
the value of epsilon is added to grid points to the right of the contour
This option defaults to 'yes' for right-of-line, and NO for left-of-
line if the DISCRETE option is being applied.
yes or no;yes or no [ | epsilon ]
DLINES = yes;yes|0.5