Triton TritonMap - Manual (Page 102)

June 2004 DelphMap™ User's Manual
Chapter 5 Working with Three-Dimensional
Contacts
You can get an approximate three-dimensional model of selective parts of your
DelphMap imagery by double-left-clicking on any part of a side-scan or
bathymetry layer. The significance of this is that if you have both sidescan sonar
imagery and topography imagery from bathymetry layer present in your project,
the sidescan sonar imagery can be “draped” over the bathymetry layer. (There is
no need for the two layers to be at the same resolution.) When you do,
DelphMap displays your three-dimensional image in a separate window. The
peaks and valleys that form the resulting three-dimensional-like image are based
on amplitude differences from the sonar returns. Thus the peaks and valleys do
not represent true height on the seafloor; instead, they are showing signal
strength differences in the imagery.
Using DelphMap’s three-dimensional Contact window you can:
• inspect the model from different angles by moving it up, down, left,
right, or diagonally.
• suppress or enable apparent resolution while moving your three-
dimensional model
• change the vertical scale or reset the viewpoint position of the three-
dimensional contact model
• display the three-dimensional contact in gridded form, solid form, or as
seen by a “flat” sonar return
• take a snapshot of the three-dimensional window and save the results
into any of four graphic formats
• update the model with a real-time mosaic
• view or suppress the implied light source that gives shape to the three-
dimensional model
• reposition the light source to show different modeling of the three-
dimensional image
• move the directional indicator to any part of the three-dimensional
Contact window
• view or suppress a three-dimensional cursor showing your current
position in the three-dimensional model
Chapter 5: Working with Three-Dimensional Contacts 88