EDGEOPTS is an option which allows users to specify boundary
conditions for the analysis.
The format of EDGEOPTS is:
EDGEOPTS = [false|true/value1;distance1/value2;distance2/spec]
--(false|true) is the flag to access outside domain contours.
default is false.
--valueN is the numeric contour value to assign to the boundary condition.
--distanceN is the distance in rows/columns away from the closest "spec".
--spec is either "c" for contour, or "e" for a combination of contour and
grid edge, whichever is greater.
Note: if contours extend beyond the grid edge, then (false|true) is set
to true by rule.
If an open line is entountered, the boundary condition will not