Triton TritonMap - Manual (Page 131)

June 2004 DelphMap™ User's Manual
Computing Volumetric Differences
To make a valid volumetric comparison between any two bathymetry DDS_VIF files
from the same area, you must use the same method and approach in gathering data for
the two surveys. In addition to conducting your second survey over the same area that
you did for the first survey, you should use the same range scales, and your towfish
should be operating at the same altitude while recording each mosaic.
To compute volume differences between two similar bathy files
1. Open an existing project or create a new one.
2. Into the open project insert two layers representing two similar but possibly
different bathymetry DDS_VIF files.
FIGURE 58. The Volume Computation dialog box
3. From the DelphMap main menu, access Tools
→Volume computation.
The system displays the Volume Computation dialog box (Figure 58).
Chapter 7: Printing and Comparing 117