The Detect Bottom Surface dialog box is used to enter the settings that will be used to detect a 3D bottom surface from multibeam echogram data. The 3D bottom surface is the result of applying the Multibeam bottom detection algorithm.
To display the Detect Bottom Surface dialog box:
Display a multibeam echogram.
On the Echogram menu, point to Create 3D object and then click Bottom Surface.
The Detect Bottom Surface dialog box contains the following settings:
|
Settings |
Description |
|
Name |
Enter a name for the 3D bottom surface. |
|
First ping |
Enter the index number of the first ping to include in the detection process. |
|
Last ping |
Enter the index number of the last ping to include in the detection process. |
|
Max triangulation distance |
Enter the maximum allowable distance between points in the surface. Where this distance is exceeded a gap will be displayed in the surface. |
Notes:
You can only detect a 3D bottom surface if GPS data are available.
Each surface has its own 3D Object Properties dialog box where the name and appearance can be edited and details about the 3D object are available.
To view the surface you will need to add it to a scene, see About the Scene window.
You can resample a 3D bottom surface with a different resolution using the Resample Surface dialog box available from the Scene Manager.
If the detected bottom surface appears unusual please refer to known 3D surface detection problems.
About scenes
Using scenes
About 3D objects
About Surfaces
Creating 3D objects
Resample Surface dialog box
3D Object Properties dialog box
Bottom detection on multibeam echograms