Editing fish tracks

Fish track editing functions fall into two categories:

Before you begin

You should be familiar with the following details about fish track editing before completing any of the tasks described on this page:

Fish tracks on single target echogram may be edited using context sensitive features on the Shortcut menu (right-click).
If you are making a selection around fish track(s), the top mid-point of the right most single target in the required fish track(s) must be contained within the selection.
If you are making a selection around individual target(s), the top mid-point of the required target(s) must be contained within the selection.

Editing or deleting fish tracks within a selection

Select fish track

Draw a rectangular selection over any part of a fish track, on the Shortcut menu click Select Fish Track. Echoview will make active a single fish track.

Delete multiple fish tracks

To delete multiple fish tracks:

Make a rectangular selection that includes the tracks you wish to delete.
On the Shortcut menu (right-click), click Delete Fish Track in Selection.
- OR -
Press CTRL+X.

All fish track regions for which the right most (latest) point is within the selection are deleted.

Note: If you delete fish track(s) by mistake, you can restore them by clicking the Undo button, or pressing CTRL+Z.

Merge the fish tracks in a selection

To merge two or more fish tracks:

Make a rectangular selection that includes the fish tracks you wish to merge.
On the Shortcut menu (right-click), click Merge Fish Tracks. Echoview merges the active fish track and those in the selection.
- OR -
Press the SHIFT+M.

Create a fish track from a selection of targets

To create a fish track from a selection of single targets:

Make a Rectangular/Paralellogram/Polygon selection that includes the targets.
On the Shortcut menu (right-click), click Create Fish Track from Targets.

Edit a fish track on a graph

Graph windows that display fish tracks are capable of editing fish tracks when the graph linking is set to Selection. This technique requires the display of fish tracks on a single target echogram window, in order to identify the active fish track region acting as the subject of the edit.

Open a single target echogram that has fish tracks.
Click a fish track and make a selection around the fish track and single targets of interest.
On the Shortcut menu (right-click), click Graph Selection, 2D Projections or a graph that can display single targets and fish tracks.
Click a graph.
Under Graph menu, Linking select Selection.
On the single target echogram, the active fish track is displayed with a moving boundary.
On a graph window, move the mouse pointer to a single target.
1. When the target is part of the fish track, the graph Shortcut menu, Remove Target is available.
2. When the target is not part of the current fish track, the graph Shortcut menu, Add Target is available.
Make your edit. The graph window and the single target echogram will update to display the change in the fish track.

Notes:

The technique may also be used with the single target angles graph.
On a graph, not all displayed single targets may be suitable for an Add Target.
If you are using the 2D projection graphs, ensure Selection linking is set for all the displayed graph windows,

Editing or deleting a single fish track

Select a fish track

Move the mouse pointer over a fish track, use the Shortcut menu and click Select Fish Track.

- OR -

Press SHIFT+S and place the mouse point over a fish track. The fish track will become active. Release SHIFT+S and use the Shortcut menu.

See also: Select a Fish track (Rectangular selection).

Add a target to a fish track

To add one target to a selected fish track:

Select a fish track.
Note: The selected fish track will be displayed with a thicker region border.
Right-click on the target you wish to add to the select fish track.
On the Shortcut (right-click) menu, click Add Target.

Add a selection of targets to a fish track

To add more than one target to a fish track at the same time:

Select a fish track.
Note: The selected fish track will be displayed with a thicker region border.
Draw a rectangular selection around the targets you want to add to the selected track.
On the Shortcut (right-click) menu, click Add Targets to Fish Track.
- OR -
Press the G key.

Remove a target from a fish track

To remove a target from a fish track:

Select a fish track.
Move the mouse pointer over the target you wish to remove.
On the Shortcut (right-click) menu, click Remove Target.

Remove a selection of targets from a fish track

To remove a series of targets from a fish track:

Select a fish track.
Draw a rectangular selection around the targets you wish to remove from the track.
On the Shortcut (right-click) menu, click Remove Targets from Fish Track
- OR -
Press the H key.

Delete a single fish track

To delete a single fish track:

Select a fish track.
On the Shortcut (right-click) menu, click Delete Region.
- OR -
Press DELETE.

Merge a fish track with another fish track

To merge two fish tracks:

Select a fish track.
Move the mouse pointer over the fish track you wish to merge with the selected fish track.
On the Shortcut (right-click) menu, click Merge Fish Tracks
- OR -
Press the SHIFT+M key.
Note: This option is only available if a single fish track region can be identified. If you right-click on overlapping regions, the option will not be displayed.

Note: It is also possible to merge two fish tracks by drawing a selection around them, and using Shortcut menu (right-click), Merge Fish Tracks.

Split a fish track into two fish tracks

To split a fish track:

Select the fish track you wish to split.
Move the mouse pointer over the point at which you wish to split the fish track.
On the Shortcut (right-click) menu, click Split Fish Track.

The first fish track will contain all targets before the splitting point, the second track will contain all targets beyond the splitting point.

Convert a region into a fish track region

If you have regions defined on your single target echogram that are not fish track regions (that is, they are marker, analysis or bad data regions) it is possible to convert them to fish track regions as long as they only have one target per ping within each ping in the region.

To convert a region to a fish track:

Select the region you wish to convert to a fish track.
On the Shortcut (right-click) menu, click Convert to Fish Track.