Grid page

The Grid page of the Variable Properties dialog box is used to enter settings for the display, integration and export of cells grid. The same grid is used for display on the echogram, along-track display and for analyses over cells.

Settings

Description

Show time/distance grid

Choose the type of time/distance grid you want to use from the list, then specify the Separation between grid lines.

These settings define the intervals reported in the analysis export and displayed on the screen.

Start interval numbers at the start of the echogram

Select this setting to enable relative interval numbering. Interval numbers begin from the start of the echogram.

Clear this setting to enable absolute interval numbering. Interval numbers begin from the start of the time/distance quantity.

For more information refer to About interval and layer numbers.

Show depth/range/Line-referenced grid

Choose gird type from the list to apply a depth/range grid to the echogram, then specify the Separation (m) between the grid lines.

The grid separation depends on the Echogram mode. It is applied as a depth separation when the echogram is in depth mode and is applied as a range separation when the echogram is in range mode. See About depth and range.

These settings define the layers reported in the analysis export.

Notes:

Layers are numbered relative to the Depth/range/Line-referenced setting. The name of line can be exported as the analysis variable Grid_reference_line. This and related analysis variables can be specified under the Analysis Domain group on the Export page of the EV File Properties dialog box.
A hidden line becomes visible when it is selected as a grid reference-line.

Depth/range/Line-referenced grid list	Description
Transducer face (range of zero)	Available when the Echogram mode is set to Range. Range (m) is measured from the line Transducer face (range of zero). Transducer face (range of zero) is equivalent to the Range Grid option available in versions prior to Echoview 5.
Surface (depth of zero)	Available when the Echogram mode is set to Depth. Depth (m) is measured from the line Surface (depth of zero). Surface (depth of zero) is equivalent to the Depth Grid option available in versions prior to Echoview 5.
Line-reference	Names of available lines in the EV file.

Note: A grid is currently not supported for multibeam echograms with a 360 degree sector angle.

Grid page

See also