Triton Isis - Manual (Page 185)

June 2004 Isis® Sonar User's Manual, Volume1 171
Do not click STOP in Isis!
Create the empty matrix file
1. In the Delph Mosaic and DTM dialog box, click Set Projection and
Bounding Box. At a minimum you should enter the Resolution and
verify that the values displayed in the Input and Output projection boxes
are correct for your data.
For example, if your XTF file has navigation in Lat/Long, then the Input
projection will be Not Projected (Longitude, Latitude), and the Output
projection will default to the appropriate UTM zone.
2. In the Map and Projection Settings dialog box, you will see the E-W
dimensions of the area and the coordinates of the NW corner of the area.
If you need to, you can change these parameters by accommodating a
larger (or smaller) area or different NW corner. To gain access to these
fields, uncheck the Set Default Limit box.
3. Click OK, check the box marked Build Sidescan Mosaic, and then click
Start Mosaic.
4. In the Save As dialog box select the name of the mosaic file and its
location (you do not need to add the DDS_VIF extension) and click
Save.
After a blank mosaic file has been created, the system reports:
Successfully started mosaic.
5. If you click More Options, you can apply layback to the positioning. This
layback can either come from the layback in the XTF file, or you can type
it in manually at this time.
6. If the towfish was attached to the vessel, instead of being towed when
the data was acquired, you have additional choices that can be accessed
if you uncheck the Apply Layback box: You can then choose Course
made good, Heading (from a fish mounted gyro), or Gyro (from the
vessel gyro). In the majority of cases, the default Course made good is
best.
Leave the Delph Mosaic and DTM dialog box open! —
This must be active to create the mosaic file!
Chapter 9: Using the Tools Menu