Exporting fish track analyses

There are two exports types for fish track analyses:

• Fish Track analysis by regions
• Fish Track analysis by cells

Generally, you perform the export on a single targets echogram (rather than a Sv echogram, TS echogram etc). The echogram should have at least one defined region that is visible.

Notes:

• You must have a licensed Fish Tracking module to export fish tracks.
• The pre-Echoview 5 Logged Draft setting may have affected results.
• Several platform settings can affect fish track analysis results.

Setting up the export

Choose the analysis variables to export, and the export format:

1. Open the EV File Properties dialog box (Press F6).
2. Click on the Export tab.
   1. under the Analysis variables to export section, select the fish track analysis variables to export.
   In the Output format section choose the required export format.
   2. Enable the export of empty cells, in the General section. (For Fish Track analysis by cells only.)
3. Click OK to save your changes and close the EV File Properties dialog box.

Fish track analysis by regions

Exports analysis variables for fish tracks to a .csv file. Each line of the output file(s) contains the analysis variables for a single fish track.

1. Complete the set up.
2. Bring the single target echogram with detected fish tracks into focus.
3. On the menu, navigate to Echogram, Export, Analysis by Regions and click Fish Tracks... to open the Export fish track - Select Classes dialog box.
4. Choose the region class(es) of interest, then click Export... to open the save file dialog box.
5. Navigate to a destination folder and enter a File name for the file(s).
6. Click Save.

Fish track analysis by cells

Exports analysis variables for fish tracks and identifies the cell in which the fish track is located. Each line of the output file(s) contains the analysis variables for a single fish track and the cell (identified by the Layer and Interval values) in which the fish track is located.

1. Complete the set up.
2. Bring the single target echogram with detected fish tracks into focus.
3. Define a grid (if not already done).
4. On the menu, navigate to Echogram, Export, Analysis by Cells and click Fish Tracks... to open the Export fish track - Select Classes dialog box.
5. Choose the region class(es) of interest, then click Export... to open the save file dialog box.
6. Navigate to a destination folder and enter a File name for the file(s).
7. Click Save.

Notes:

• Invalid fish tracks will be included in fish track analysis exports. Valid values from these regions such as start ping and stop ping will be populated with the correct data while invalid values will be populated with null values.
• To be counted in a cell, a fish track's end point must lie within the cell. For more information refer to About fish track regions - Inclusion in cells and Output empty cells - For fish track exports.
• The fish track analysis export includes a subset of Single target export file format (*.target.csv) and also includes:
  • Region_bottom_altitude_max
  • Region_bottom_altitude_mean
  • Region_bottom_altitude_min
  • Region_top_altitude_max
  • Region_top_altitude_mean
  • Region_top_altitude_min
• See also Automatically exported variables for fish track analyses.

See also

About detecting fish tracks
Fish track editing
About beam geometry
Fish track analysis variables
Special Export Values
Analyze Region dialog box
About interval and layer values in export files
Transducer geometry illustrated - fixed platform example