4D window

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:

• the Filesets window
• View menu, 4D and select a virtual variable or a derived multibeam variable from a fileset
• the Dataflow window for a selected multibeam variable under the right-click Shortcut menu, 4D

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.

• 4D navigation
• Time slider and replay controls
• Display settings and preferences

Notes:

• When the Platform is Fixed and several pings are displayed, pings will overlap when drawn since all pings have the same position. This can cause visual artifacts, especially when heading is available and pings have slight rotations relative to each other.  These artifacts will appear as half of one ping drawing on one side and half of another ping drawing on the other due to the ping rotations derived from the heading.
• Display driver issues may appear when using the 4D window through Windows Remote Desktop. In some cases this may cause Echoview to crash.

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:

• Scroll mouse wheel to zoom (when the mouse pointer is over a sample).
• Press mouse wheel and drag mouse, when the mouse pointer is over a sample, to pan the contents of the window in any direction.
• SHIFT + press mouse wheel and drag mouse to rotate the eye.
• CTRL + press mouse wheel and drag to rotate around the sample under the mouse pointer.
• CTRL + SHIFT + press mouse wheel + drag mouse up/down to change the vertical exaggeration of the view.

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:

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:

See also

4D Display page