2.0

Table Of Contents

Creating Contours from a Grading Object

NOTE

In certain situations, when you create a surface from a grading

object that has transitions from cut to fill, the surface boundary may

not be honored at those locations. You should check for TIN lines

outside of the boundary where there is a transition from cut to fill

and eliminate these lines by using surface editing functions after

creating the surface.

After you have created the surface, it has the same functions as other surfaces

and you can manage the surface from within the Terrain Model Explorer.

To create a surface from a grading object

1 From the Grading menu, choose Slope Grading

Create Surface.

The following prompt is displayed:

Select a graded object:

2 Click on a grading object in your drawing to display the New Surface

dialog box.

3 Type a name for the surface in the New Surface box. The name is limited to

40 characters.

4 Type a description for the surface in the Description box. The description is

limited to 40 characters.

5 Click OK. The command then creates and builds a new surface.

NOTE

The surface created uses only the data obtained from the grading object you

selected in step 2. However, you can add additional data to the surface by

using the Terrain Model Explorer.

NOTE

If you explode a grading object and build a surface from the exploded

objects, then the surface will have the same characteristics of a surface that

was created from an unexploded grading object, except for boundary lines.

Creating Contours from a Grading Object

Using the Create Contours command, you can directly create contours from

a Grading Object without having to first create a Digital Terrain Model

(DTM). When you use the Create Contours command, a DTM is created

from the Grading Object only in memory. The daylight line is the boundary