2.0

Table Of Contents
Calculating General Statistics About a Grading Object
45
Calculating General Statistics About a
Grading Object
For each grading object, you can calculate statistics that list station information,
such as start and end locations of the footprint, and start and end locations of
the grading applied to that footprint. You can also calculate general reference
volume statistics for the grading object, which include cut, fill, and net
volumes.
If the grading object you created does not meet certain requirements, then the
Calculate Volume command and the Statistics property page cannot generate
volumes. In this instance, or if you want to verify volume calculations, you can
create a surface from the grading object (and add surface information to the
interior of the footprint, such as points, contours, or 3D polylines if needed.
After you create a surface from the grading object, you can use the Volume
commands on the Terrain menu to calculate volumes.
Volumes are only calculated under the following conditions:
n
If the target is a surface and the grading direction is to the outside of a closed
footprint (volumes are calculated between the object and the surface).
n
If the target is an absolute elevation (volumes are calculated between the
object and the elevation).
Volumes are not calculated under the following conditions:
n
If the grading object has multiple targets.
n
If the grading object has a single relative elevation target.
n
If the footprint is closed and graded to the inside using a surface target.
n
If the daylight line(s) cross and the condition is detected by the program.
NOTE
If you make changes to the Grading Properties, you must regenerate the
grading object before you can calculate volumes. To regenerate the
grading object click OK to exit the Grading Properties dialog box (this
updates the grading object with the changes), then open the Statistics
tab and run the command.
NOTE
Calculating statistics may require a moderate amount of processing time.
NOTE
Volumes may not be accurate if a daylight line(s) cross within the object.
In most circumstances, the program detects this condition, and no
volumes are calculated.