In this exercise, you will calculate volumes by the composite volumes method.

1. On the View menu, click Named Views to display the View dialog box. Under Name, select 1, click Set Current, and then click OK.

2. On the Terrain menu, click Composite Volumes Calculate Total Site Volume to display the Site Volume Librarian dialog box.

3. From the Select site list, select Site1, and then click OK to display the Composite Volume Settings dialog box.

4. Accept the default values in this dialog box by clicking OK and displaying the Volume Results Surface dialog box.

5. Enter C1-Site1 for the New surface, and then click OK.

   The composite volumes method calculations are displayed on the command line, with a cut volume of 3,475 m3, and fill volume of 20,940 m3, and a net volume of 17,465 m3 of fill.

   Use the following steps to open the Terrain Model Explorer and view the C1-Site1 volume.

6. On the Terrain menu, click Terrain Model Explorer to display the Terrain Model Explorer.

7. Under the Volume folder select C1-Site1, right-click and click Surface Display Quick View.

8. Move the Terrain Model Explorer to see the quick view entities.

   Click here to see an illustration of the composite volumes surface quick view.

9. Close the Terrain Model Explorer, and then on the command line, enter REDRAW to clear the quick view entities.

With the Composite Volumes method no clipping of grid squares occurs, and no unexpected surface triangulation line are generated, resulting in higher volume totals than with the Grid Volumes method. In this case, a net fill volume of 17,465 m3 was output using composite volumes, compared with a net volume of 17,004 m3 using grid volumes.