HIPS and SIPS Module : HIPS and SIPS Editors : LIDAR Data in HIPS : Sounding Quality and Status Flags : Selecting Detected and Alternative Data
 

Selecting Detected and Alternative Data

In some instances, two depth values (detected and alternative) are returned. You can decide which depth value is most relevant and change the sounding's quality flag accordingly. This can be done in either the Swath Editor or the Subset Editor.

Soundings are highlighted in the colour that is set in the Tools > Options > Display > Editors > Lidar dialog box.

Command

Description

Edit > LIDAR > Highlight Alternative Depths

Soundings with a Quality flag of 1, 2, or 3 that contain valid alternative depths are highlighted. It does not select or superselect soundings.This command only highlights data in the Plan View.

Select from three options:

• View all alternative depths

• Swap to alternative

• Keep detected.

Edit > LIDAR > View Alternative Depths

This command refreshes the display so that the alternative depths for soundings with a Quality 1 flag are shown. This is a useful tool for viewing the position of alternative depths in relation to neighbouring soundings.

Edit > LIDAR > Swap to Alternative

This command applies an alternative depth in a superselected sounding with a Quality 1 flag.to the detected depth. With SHOALS data, the depth is swapped, and with LADS data, the depth and position are swapped.

An asterisk beside the depth value indicates whether the detected or alternative depth is currently in the HIPS depth file

Keep detected

This command is used to verify that the detected depth is preferred over the alternative depth (see “Sounding Quality and Status Flags” on page 745).

1. Select soundings and superselect a sounding with a Quality 1 flag.

2. Select the Keep Detected command.

The Quality flag is changed to 2.

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