HIPS Data Properties

Description

Colours

In the Subset Editor View, attributes of data such as depth or uncertainty can be identified visually by assigning colours to different attribute values.

1. Some of these colours are set using a colour map to represent a range of values r. If a specific range of values is not set for the attribute, it is automatically read from the subset.

• The colour at the top end of the selected map represents the minimum value (and all values less than the minimum value).

• The colour at the bottom of the map represents maximum value (and all values greater than the maximum value).

• The colours in between the minimum and maximum colours represent the depths and uncertainties between the defined range.

The Reverse Colours check box will change the colour mapped to the minimum value with that of the maximum value, and vice versa.

Certain attributes such as ISO S-57 order or Detection Type have a specific colour for each value. These default colours can be changed by selecting another colour from the drop-down colour picker.

Auto load subset

The Auto Load Subset control will automatically load subset data in the 3-D and 2-D Views when a subset area is created or changed.

The value set in the Point size field controls the size of the points in the 2D and 3D views. The value can be set between 1 and 10.

Vertical Reference

Data can be shifted vertically using either a tide or a currently open surface to visually change the data in the display. (No changes are made to the stored data.)

Use Tide Source to generate final depths relative to a tide datum by subtracting the tide values from the sounding depth.

Use an open surface or an open XYZ file to shift using a grid of datum heights.

1. Select the Datum Shift check box and click Browse to open the Select Surface dialog box.

2. Select a surface to use from the list of open surfaces. Click OK.

Subset Statistics

Each time a subset is generated, the following information is displayed:

• total soundings in the current subset

• number and percentage of soundings with Accepted and Rejected status

• dimensions of the subset

• minimum and maximum depth levels within the range of the subset.

Survey Lines

The Survey lines section displays the currently open data in a read-only data tree.