Echogram Display page

Settings

Description

Color display minimum

Sets the value below which all data values will be displayed in the Below threshold color of the selected color scheme.

Note: If the minimum threshold specified on the Data page is higher than the Color display minimum specified here, the data threshold specified on the Data page will define the lowest value displayed.

The keyboard shortcuts, F11 and F12, will adjust this value when used in an echogram window.

Color display range

Sets the range of data values which are mapped to the selected color scheme. All values above (Color display minimum + Color display range) will be displayed in the color schemes Above (threshold + range) color.

Color legend label location

Use the Color legend label location list to specify the placement of the Color legend units label. The label specifies data type and units.

List options include:

• Left of the color bar
• Right of the color bar
• No label

Color Scheme

Choose from predefined or customized echogram color schemes.

User-defined color schemes can be created and edited with the Echocolor application supplied with Echoview. If you add, remove or change the color-scheme files in this folder you will need to restart Echoview before those changes take effect.

Note: If a custom color scheme has the same name as a predefined color scheme, its name will have " (.evc file)" appended to it to denote this. See About color schemes for further information.

Use alternate color scheme

Select the Use alternate color scheme box to use the alternative color scheme for the echogram.

Background color

Background color is only available for multibeam variables. Click the Color box to specify a background color.

Settings

Description

Minor-axis angle range (degrees)

Enter the range of minor-axis beam angles to display. The values you enter must be between 0.01 and 90 degrees.

Minor- axis color scheme

Choose from predefined or customized color schemes. See note below.

Major-axis angle range (degrees)

Enter the range of major-axis beam angles to display. The values you enter must be between 0.01 and 90 degrees.

Major-axis color scheme

Choose from predefined or customized color schemes. See note below.

Settings

Description

Automatically set the display limits based on the loaded pings

Select this setting when you want the echogram to display data from the entire sample range. This setting accommodates new (added) data and new EV files based on templates.

Variables in new EV files select this setting by default.

Note: The Display limits can change as you scroll the echogram. This may occur when Echoview draws pings which have a bigger range than previous pings.

Manually set the display limits

Select this setting when you want to specify the sample display range.

Upper and lower display limits are entered in meters and will apply to either depth or range depending on the mode selected on the Echogram page of the EV File Properties dialog box.

The upper and lower display limits cannot be overridden by zooming out. To see parts of the echogram outside the currently displayed limits the above settings must be changed.

Settings

Description

Integram analysis

Choose an integram analysis to display in the integram area of the echogram. You can choose from:

• Ping status
• Mean Sv (on Sv echograms only)
• Maximum Sv (on Sv echograms only)
• Bottom classification (on Sv echograms only)

For more information refer to About the integram and Using the integram.

Displays the Integram Sv threshold value and the condition applied to the value. These settings are used to locate particular pings with the Next integram value / Previous integram value feature from the Shortcut menu.

Available settings:

Notes:

• The Next integram value / Previous integram value feature shifts the echogram to and displays a marker around the pings that satisfy the Integram Sv threshold condition and value.
• The Mean Sv analysis and Maximum Sv analysis are affected by the Exclude Above and Exclude Below settings on the Analysis page of the Variable Properties dialog box.
• For more information refer to About the integram and Using the integram.
• Integram keyboard shortcuts.

Bottom classification variable

Use the list to specify the variable for the Bottom classification integram that is displayed on the Sv echogram. For further information refer to About bottom classification.

Settings

Description

Echogram reference line

Available for the display of single beam echograms only.

Flattens the specified reference line and displays it as a horizontal line on the echogram. Use the Reference line list to specify an Echogram reference line. See also About lines: Echogram reference line.

Integration line

Choose to display an Integration line for the data in an Integration rectangle on the echogram.

You can choose from:

Integration line	Description
None	No Integration line displayed
In window	Display an Integration line for the data in the visible window.
In intervals	Display an Integration line for the data in an interval. The integration rectangle is defined by the height of the visible window and the width of the interval.
In cells	Display an Integration line for the data in a cell.

Note: While the echogram is active, you can change the Integration rectangle (successively) using CTRL+SHIFT+I

To choose the color of the Integration line

1. Click the colored square beside Integration line.

2. Select a basic color or create a custom color.

3. Click OK.

See Integration line algorithm for more information.

Flip echogram vertically

Choose to flip the echogram so that depth/range = 0 m is at the bottom of the window. Values increase as you move up the window.

See also Upward facing transducer echogram example.

Setting

Description

Flip vertically

Select this checkbox to display range/depth = 0 m at the bottom of the multibeam echogram window.

See also Sound Metrics notes: Imaging sonar lens mount orientation.

Flip horizontally

Select this checkbox to rotate the multibeam echogram 180 degrees in the horizontal plane. Beams and beam numbering read from highest (left) to lowest (right).

See also Sound Metrics notes: Imaging sonar lens mount orientation.

Show direction labels

Select this checkbox to show the direction of the beam numbering for the sector plot. This setting is a useful orientation cue when you use Flip horizontally.

Show target sample outlines

Select this checkbox to display outlines around the samples included in detected multibeam targets.

This setting can be toggled with a user-defined shortcut.

Select this checkbox to display the input data for the detected multibeam targets.

This setting can be toggled with a user-defined shortcut.

Show target class labels

Clear this checkbox to hide target class labels for detected multibeam targets.

Show multibeam bottom preview

Select this checkbox to display a preview of potential bottom samples on a multibeam echogram. A circular mark is drawn on each sample.

Orientation

(Available for H-mode variables.)

Select either North up or Head up.

If North up is selected then the echogram will be oriented such that geographic north is in the upwards on the screen.

If Head up is selected then the echogram will be oriented such that heading of the vessel is in the upwards direction on the screen.

The beam numbering in either case is instrument specific.