Defining and creating regions

Regions can either be defined from single beam echograms (2D regions), cruise track windows (2D regions) or created from multibeam echograms (3D regions). This page covers

Notes:

There is no functional difference between defining and creating regions. Historically regions were defined in Echoview and 3D objects were created.
School detection and fish track detection create 2D regions.

Defining 2D regions

To define a region from a selection:

Make a selection, on an echogram use any selection tool, on a CruiseTrack use a Vertical band tool.
On the Shortcut menu (right-click), click Define region.
Enter required values on the Region Browser dialog box.
Click Close.

Notes:

The default region type is the last region type used, otherwise assign a different region type with the Region Browser. See also Classifying regions.
On echograms with a grid, create a region based on the cell under the mouse pointer with Shortcut menu, Define a Region from a Cell.
Define a region on a cruise track or alongtrack window.
Single-ping regions can be created using shortcuts.
Use SHIFT+J to define a region from a selection and assign the region class to Bad data (empty water).
See also: Known issues—Cruise track window: Vertical band selection and Define region.

On echograms, you can also define a region relative to a line or lines. To define a line-relative region:

Make a selection using the Vertical band tool or Horizontal band tool .
Note: These tools select a band that spans the entire vertical (depth/range) or horizontal (time/distance) dimension of the echogram.
On the Shortcut menu (right-click), click Define Line-Relative Region.
Enter required values on the Define Line-Relative Region dialog box.
Click Define.

Note: A line-relative region is not dynamically linked to a line. If you edit the line(s) relative to which the region was defined, you may need to redefine the region.

See Echogram Keyboard shortcuts for shortcuts you can use to define regions.

Duplicate region

Duplicate Region duplicates a selected region(s) and assigns a new name(s) and unique ID to the duplicated region(s). Post duplication, some further region editing may be useful; see Classifying regions and Editing regions.

Echogram

Select a region on an echogram, right-click and select Duplicate Region.

Regions window

Select a region(s) on the Regions window, right-click and select Duplicate Region.

- OR -

Select a region(s) on the Regions window, on the Region menu, select Duplicate Region.

Creating 3D regions

To create a 3D region you can either: