Integration Results (cell) dialog box

The Integration Results for cells dialog box displays the integration results for a cell integration on an Sv echogram.

To display the Integration Results dialog box:

Point to a cell on an Sv echogram.
On the Shortcut menu (right-click), click Integrate Cell.

The results are displayed on two pages:

Cell page - analysis variables for the cell
Regions page - the PRC_NASC value for (analysis) region-cell intersection within the cell (if any)

Cell page

The Cell page of the Integration Results dialog box displays the analysis variables for the cell.

Note: The analysis variables that are displayed differ depending on whether you are working in depth mode or range mode, see About depth, range and altitude.

Analysis variable	Description
General
Sv mean	The mean volume backscattering strength. Algorithm
Sv minimum	The minimum Sv value (that is above the below threshold value of -999 dB) included in the integration.
Sv maximum	The maximum Sv value included in the integration.
NASC	The Nautical area scattering coefficient (sA as used by Simrad).
ABC	The Area Backscattering Coefficient.
Domain
Height mean (in depth mode) -or- Thickness mean (in range mode)	The average thickness/height of the cell calculated over the pings included in the integration.
Depth mean -or- Range mean	The average range/depth of samples included in the cell. See About depth, range and altitude.
Beam volume sum	The sum of the beam volumes of all pings in the cell. See Beam_volume_sum for more information.
Exclude below line depth mean - or- Exclude below line range mean	The average range/depth of the line entered in the exclude below text box (on the Analysis page of the Variable Properties dialog box) over pings with a "good" line status included in the integration. Generally the exclude below line would be the bottom. See About depth, range and altitude.
Counts
Good samples	The number of sample data points actually included in the integration. Data points can be excluded if they fall within bad data regions, above an Exclude above line or below an Exclude below line. The Exclude below line and Exclude above line are specified on the Analysis page of the Variable Properties dialog box. May be exported as Good_samples. Algorithm
Bad data no data samples	The number of bad data (no data) samples in bad data regions. May be exported as Bad_data_no_data_samples. Algorithm
Bad data empty water samples	The number of bad data (empty water) samples in bad data regions. May be exported as Bad_data_empty_water_samples. Algorithm
No_data samples	The number of no data samples. May be exported as No_data_samples. Algorithm
Samples above surface exclusion	The number of samples above the Exclude above line. May be exported as Samples_above_surface_exclusion. Algorithm
Samples below bottom exclusion	The number of samples below the Exclude below line. May be exported as Samples_below_bottom_exclusion. Algorithm
Samples in domain	The number of samples contained within the selection. May be exported as Sample_in_domain. Algorithm
Pings	The number of pings between the start and end time of the cell. The number of pings is not affected by bad data regions.
Cell
Interval	Interval number of the cell.
Layer	Layer number of the cell.
Bottom*
Bottom_roughness_normalized	The value of Bottom_roughness_normalized for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.
Bottom_hardness_normalized	The value of Bottom_hardness_normalized for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.
First_bottom_length_normalized	The value of First_bottom_length_normalized for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.
Second_bottom_length_normalized	The value of Second_bottom_length_normalized for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.
Bottom_rise_time_normalized	The value of Bottom_rise_time_normalized for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.
Bottom_line_depth_mean	The value of Bottom_line_depth_mean for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.
Bottom_max_Sv (dB)	The value of Bottom_max_Sv for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.
Bottom_kurtosis	The value of Bottom_kurtosis for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.
Bottom_skewness	The value of Bottom_skewness for the cell, where the classification algorithm Feature extraction interval is the number of pings in the cell.

Note: *Echoview displays extracted features only when bottom point export variables are selected on the Export page of the EV File Properties dialog box. The quality of the extracted features relies on the suitability of the bottom line, the overlap of the selection/region/cell with the first and second bottom echoes, the quality of the Bottom echo threshold at 1m and the suitability of the Feature Extraction Interval. Bottom calculations ignore the use of the bottom line as an Exclude below line. Bottom calculations consider data from the pings that intersect the region, cell or selection. For more information refer to Configuring a bottom classification.

Regions page

The Regions page of the Integration Results (cell) dialog box displays:

the PRC_NASC for that part of each analysis region that is located within the selected cell
the PRC_NASC for the remainder of the cell
the Cell NASC - Sum(PRC_NASC(regions))

Notes:

This page is only displayed if the cell contains analysis region(s).
A negative value for Cell NASC - Sum(PRC_NASC(regions)) indicates that the regions in the cell overlap and that the additivity criterion for PRC_NASC does not apply to the cell. To adhere to the additivity criterion, you will need to edit the boundaries of the regions. See also Creating regions: Line-relative regions.

Integration Results (cell) dialog box

Cell page

Regions page

See also