The definition of the numbers in the report are self-explanatory under each heading of the report. The Slope Area measured applies the sloping surface area to achieve a more accurate representation of the 3D surface. Vertical slopes, such as the face of curb, are not taken into consideration when calculating this sloped surface area.
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Anytime the existing or design surface is modified, the previous volume report becomes invalid and that option to view the report is unavailable until the volumes are calculated again. To calculate the volumes, switch to the 3D View, verify the Volume Area to calculate, and calculate the volumes. The volume reports are only included as part of the ESW file when no geometry changes have been made to the after the volume calculation.
The Reference and Difference Surfaces
Different volumes can be calculated be changing which surfaces are being compared. In the example above, the Subgrade (Reference or Ref) is compared to the Stripped (Difference or Diff) surface..The stripping volumes and sectional quantities are displayed below the cut/fill volumes.