2.0

Chapter 1 Using the Grading Commands
62
Creating Breaklines from a Grading Object
You can create breaklines from a grading object and add them to the current
surface, to a new surface, or to any existing surface.
When you create breaklines from a grading object, the breakline information is
determined from the following features:
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Footprint: A breakline is created from the footprint, using each vertex on the
footprint, and a vertex at each projection line location. On arc segments, the
breakline vertices correspond to the locations where the projection lines
intersect the arc. Arcs become a series of straight line segments.
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Daylight Lines: A breakline is created from each cut/fill segment of the
daylight line.
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Projection Lines: A breakline is created from each projection line.
The following illustration shows footprint and daylight line locations.
Footprint and daylight breakline vertex locations
To create breaklines from a grading object
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From the Grading menu, choose Slope Grading
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Create Breaklines.
The following prompt is displayed:
Surface to add breaklines to (Current/New/Select) <Current>:
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Type one of the following options:
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Current to add breaklines to the current surface. Select the grading object
and enter a description for the breaklines.
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New to add the breaklines to a new surface. The New Surface dialog box is
displayed. Enter a name and a description for the new surface and click OK.
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Select to add the breaklines to an existing surface. The Select Surface dialog
box is displayed. Select the surface you want the breaklines to be added to
and click OK.