4D window

4D demo

Left, 4D window with ME70 georeferenced samples depicting rockfish.

Multibeam Sv variable showing all pings and (green) cruise track. Change Display threshold (F12) reveals schools. Zoom, rotate around samples and pan.

This is a window that displays georeferenced samples in time. 4D visualization displays your data in a true position and time context and allows more complex data relationships to be discovered. 4D is available for multibeam variables on:

This feature will be extended to single beam variables and even more functionality in future versions of Echoview.

The Color scheme and Color display settings are initially set by the properties on the variable's Echogram Display page. The number of displayed 4D pings can be varied with the time slider. The replay controls move the time slider back and forth in time. The multibeam and 4D window may be synchronized.

Notes:

4D view components

4D Navigation in window

Use the right-click Shortcut menu, Reset Navigation to re-center on samples.

Use the following actions to navigate around displayed samples:

Note: Where a mouse has no mouse wheel - substitute mouse wheel actions with SPACEBAR + left mouse button.

Time slider, Replay controls

The time slider can be used to display a number of pings. The replay controls move the time slider back and forth in time.

If the time slider does not span the window time limits then it can be moved using the following replay control buttons:

Fast reverse

Reverse

Reverse one time step

Stop

Play one time step

Play

Fast forward

See also 4D window while live viewing.

Display settings and preferences

4D display preferences may be set on the 4D Display page of the Variable Properties dialog box. Some commonly used settings are accessible using the Shortcut menu.

The Shortcut menu offers:

Setting

Description

Synchronize

Synchronizes the 4D window with displayed echograms. The 4D window can be a part of an Auto-synchronization group.

Reset Navigation

Re-centers displayed samples within the 4D window.

Vertical Exaggeration Scale

Vertical exaggeration distorts the display. A value of 1.0 (no distortion) is a good choice for multibeam samples.

Display Limits

Automatic or Manual Limits specify the samples to display. The limits are referenced to the specified Echogram mode (Range or Depth).

Color Legend

The Color scheme, Color display minimum and Color display range are set on the Echogram Display page of the variable or via the Color Legend. Use the keys F11/F12 to vary the (color) display threshold.

Variable Properties

Opens the Variable Properties dialog box.

See also

4D Display page