Edit Contours

This command revises a segment of a contour polyline. Begin by picking a point on the contour where you want to start editing. Then pick new points for the polyline. When finished picking new points, press Enter and then pick a point on the contour to connect with the new points. The polyline segment between the start and end points is then replaced with the new points.

If there is a triangulation file associated with the contours, then the command prompts for whether to update the triangulation surface file to match the contour edits. When this option is used, data points are added to the triangulation surface along the edited contour segment to make the triangulation surface match the contour line. Existing triangulation source data is retained. So the updated triangulation is the combination of the original source data and the additional points from Edit Contours. One way to get a triangulation surface associated with the contours is to use the Triangulate & Contour command with both Write Triangulation File and Draw Contours options active.

Note: If the triangulation association is not used, then this routine has no effect on the actual triangulation or grid surface model file that the contours may have been drawn from. It only revises the drawn contour or polyline on the screen. If the contours are later regenerated from this file, the edits will be discarded.

Prompts

Select contour to edit: pick the contour polyline at the place to start editing
Pick intermediate point (Enter to End): pick a point
Pick intermediate point ('U' to Undo, Enter to End): pick a point
Pick intermediate point ('U' to Undo, Enter to End): press Enter
Pick reconnection point on contour: pick the contour polyline at the place to join

Edit this contour by picking new points

Contour with segment replaced with new points

Pulldown Menu Location: Surface >> Modify Contours
Keyboard Command: editctr
Prerequisite: Polylines with elevation (contour polylines)