Draw Contour Gradient Marks
This command draws lines perpendicular to contours to shown the
downhill slope direction. In the options dialog, set the layer for
the existing contour polylines, the layer for the new gradient
lines, and the size scaler for the new lines which is relative to
the current scale from Drawing Setup. Next, the program prompts for
the surface triangulation file which should be the same surface
that the contours represent. The program uses this surface file to
determine the direction for the gradient lines. Then the program
prompts for where to draw the gradient marks. The Polyline option
draws marks at each intersection of the selected polyline with the
contours. The Point method prompts for two points and draws marks
at the contour intersections with the line defined by these two
points.
Prompts
Options Dialog
Select Surface File
Define a line which slices the contours at the place to label
them.
Pick 1st point (P-Polyline, Enter to end): pick point
Pick 2nd point: pick
point
Define a line which slices the contours at the place to label
them.
Pick 1st point (P-Polyline, Enter to end): press Enter
Pulldown Menu Location: Surface > Modify Contours
Keyboard Command: ctr_grad
Prerequisite: contour polylines and surface file