2.0

Table Of Contents

Chapter 1 Using the Grading Commands

3 Select the polyline, line, arc , or existing grading object you would like to grade

from. The following prompt is displayed:

Delete old entity (Yes/No)? <No>:

4 Type one of the following options:

Yes to delete the old entity.

No to keep the old entity.

The object is graded with the settings you entered. You can customize the

properties of the object, if necessary, using the Grading Properties

command. The Grading Properties command displays the same tabs as the

Settings command. After you enter the original grading settings and use

the Apply Grading command the Footprint tab displays coordinate data for

the grading object.

Weeding 3D Polyline Vertices

In order to optimize the grading object performance and corner cleanup, you

can use the Weed 3D Polyline Vertices command to remove extra vertices that

were added to 3D polylines with the Daylighting commands.

If you created a 3D polyline using the Daylighting commands, then you may

have added vertices to calculate additional daylight lines. If so, then



you should

weed the added vertices if you want to use this 3D polyline to



create a grading

object footprint.

Using the Weed 3D Polyline Vertices command you enter three criteria to

determine if a vertex should be removed from the 3D polyline. For each of these

criteria, the command looks at three consecutive vertices. If the three criteria for

the three consecutive vertices are met, the middle vertex is removed, and the

command continues to analyze and remove vertices until the end of the 3D

polyline is reached. These criteria are as follows:

Maximum Horizontal distance: the XY distance from the first and third

vertices must be less than the Maximum (XY) distance

Maximum Horizontal deflection angle: the XY deflection angle between the

two segments formed by the three vertices must be less than Maximum (XY)

deflection angle

Maximum Grade Change (percent): the vertical grade change between the

two segments formed by the three vertices must be less than the Maximum Z

percent grade change

To weed 3D polyline vertices

1 From the Grading menu, choose Slope Grading

Weed 3D Polyline Vertices.

2 Select the 3D polyline entities you want to weed. The Weed 3D Polyline Vertices

dialog box is displayed with the number of valid 3D polyline entities selected.

You must select at least one valid 3D polyline entity to use this command.