Variable Properties dialog box

The Variable Properties dialog box is used to control the way a variable is calibrated, analyzed, displayed, etc. Each variable in the EV file has its own Variable Properties settings that are entered separately.

To display the Variable Properties dialog box:

  • For the currently displayed variable (i.e. the variable represented by the active echogram, cruise track, table or graph)

    1. On the tool bar, click the Variable Properties tool variable properties tool.
    - OR -
    1. On the Echogram, Cruisetrack, Table, Filesets or Graph menu, click Variable Properties.
    - OR -
    1. Press F8.
  • For a raw variable that is not currently displayed

    1. On the Filesets window, click the variable and then click Properties.
    - OR -
    1. On the Dataflow window right-click the variable, then click Variable Propertiess.
    - OR -
    1. On the Dataflow window, click the variable to select it, and:
    1. On the tool bar, click Variable Properties tool variable properties tool.
    - OR -
    1. On the Dataflow menu, click Variable Properties.
    - OR -
    1. Press F8.

Note: The Command Interface displays and can export Variable Properties to a text file.

The Variable Properties dialog box can contain the following pages:

Notes:

To view and modify variable property settings

Variable Properties - Multiple Variables Selected

This is displayed when you select multiple acoustic variables on the Dataflow window and open the Variable Properties dialog box.

Checkboxes on the right side of the settings are used to indicate the shared variable properties.

  • A cleared box indicates that the setting may be specified and shared.
  • A selected box indicates that selected variables share a setting.

To share Variable Properties:

  1. On the Dataflow window, select multiple variables, on the Shortcut menu select Variable Properties.

Supported settings include:

  • Analysis page
    • Exclusions
  • Data page
    • Minimum threshold: Apply, Lock to color display minimum, Value. See Notes.
    • Maximum threshold: Apply, Lock to color display maximum, Value, Set thresholded values to. See Notes.
  • Echogram Display page
    • Echogram colors
    • Echogram display limits
    • Flip echogram vertically (single beam)
    • Multibeam: Flip vertically, Flip horizontally, Show multibeam bottom preview, Show direction labels
  • Grid page
  • Regions page
    • Clear region class checkboxes. See Notes.
    • Select region class checkboxes. See Notes.
    • Show all
    • Hide all
  • Calibration page
    • Transducer

Notes:

When the multiple Variable Properties dialog box is initially opened and the Properties aren't shared a default value is used:

  • Minimum threshold (default) is -70.0 dB
  • Maximum threshold (default) is 99.0 dB
  • Set thresholded values to (default) is Zero (-999.0 dB)
  • Transducer (default) is first item on the Transducer list

The Data page value for the Maximum threshold or Minimum threshold under Lock to color display minimum is set once on initial use of the Multiple Variable Properties dialog box. Subsequent changes to the Echogram Display Color display minimum are not passed on to multiple Variable Properties. Be aware that to achieve the correct result under a shared Lock to color display minimum, the Echogram Display Echogram colors settings for the selected variables must agree.

A Regions page region class can be denoted as (in use by operator) and be unsupported for multiple Variable Properties. This occurs when a selected variable uses a region class as in the case of a Region bitmap virtual variable.

See also

About calibrated data
About setting variable properties
About raw variables
About virtual variables
About variables