Editing Grading Objects

Because of the dynamic nature of grading objects, any edits to a feature line that serves as a grading object baseline will automatically trigger an update of the grading object. This makes most grading object editing fairly easy. In addition, there are two tools that you can use to edit the criteria that were used to create the grading object: Grading Editor and Edit Grading. The Grading Editor command opens Panorama, enabling you to edit the criteria in a table format. The Edit Grading command is a command-line interface.

To edit grading objects in your drawing, follow these steps:

The Exercise File can be downloaded at the end of the article  

1. Open the drawing named Editing Grading Objects.dwg located in the Chapter 17 class data folder.
2. Click the green feature line that represents the inside edge of the pond berm. Click the grip at the northeast corner, and then use the Center object snap to select the center of the red circle to the east. The grading object will recalculate based on the new shape of its baseline. The grading group surface will also update, enabling the contours to match the new shape as well.

3. With the feature line still selected, click Raise/Lower on the Edit Elevations panel of the ribbon. You will be prompted to specify an elevation difference.

   Tips:If the Edit Elevations panel is not visible, click Edit Elevations on the ribbon.

4. Type -1 (-0.3) and press Enter to lower the feature line by 1' (0.3m). The entire grading group and associated surface will update. Now the bottom of the pond is too low and will need to be raised.

5. Press Esc to clear the selection of the feature line. On the Modify tab of the ribbon, click Grading.

6. Click Grading Editor, and then click a point within the inside embankment of the pond. The edges of the grading object are highlighted to help you make your selection.
7. On the Grading Editor tab of Panorama, type -6 (-1.83) for Relative Elevation and press Enter. The grading group is updated and the pond bottom has been raised by 1' (0.3m).

8. On the Grading tab of the ribbon, click Edit Grading. Click a point within the area representing the top of the berm.
9. When you’re prompted to specify a distance, type 12 (3.6) and press Enter.
10. Press Enter twice to accept the default format of Grade and the default grade of 2 percent. Press Enter a third time to end the command. The grading group and surface update to accommodate the wider berm. The pond model now reflects the wider berm along with the shape and elevation changes made in earlier steps Figure 17.14.

    Figure 17.14  The pond model after several edits

Download Exercise File :

• C17 - Editing Grading Objects - Metric     --- ( 2.52 MB )
• C17 - Editing Grading Objects - Imperial  --- ( 2.99 MB )