Technical information

Calculating Volumes | 79
Calculating Volumes
You can calculate volumes or depths between surfaces by comparing them.
For example, you may want to compare existing ground surface data with as-
built data. Or, if you have borehole data, then you may want to calculate the
volumes between the top surface and rock.
AutoCAD Land Desktop includes three volume calculation methods:
■ Grid method: Creates a volume surface that is based on a grid that com-
pares elevational information between the first and second surface.
■ Composite method: Creates a volume surface that includes all the surface
points from the first and second surface. The Z values in the new surface
are the elevational difference between the first and second surface.
■ Section method: Calculates volumes based on sampled cross sections.
You can also calculate parcel volumes, which are based on parcels that exist
within the larger site.
In all cases, you need two surface models. From the two surfaces, you must
define a stratum, which specifies the two surfaces used in volume
calculations. Before you can calculate volumes, you must define a site that
represents the stratum area for which you want to calculate volumes.
8 Use the Contour Style Manager dialog box to smooth
contours, and to specify the contour appearance, the text
style for contour labels, and the label position. You can
also use this dialog box to save contour styles and add
styles from other drawings.
9 Click OK to return to the Contour Style Manager dialog
box, and then click OK to generate the contours.
10 You can label the contours using the commands in the
Terrain
➤ Contour Labels menu.
Labeling Contours
To create contours from a surface (continued)
Steps
Use to locate