Subset Editor

The Subset Editor is a tool for viewing and editing georeferenced sounding data.

With Subset Editor you can:

• view a subset of data in a three-dimensional mode so features such as depressions and rises are visible

• view a slice of data within the selected subset in a scaled view

• rotate data to view it from different angles

• view coverages as reference sources

• find and designate soundings

• flag soundings to the status of:

• rejected

• accepted

• designated

The Subset Editor interface contains the following components:

• Subset Editor - 3D View window: A three-dimensional view of all soundings in the subset area.

• Subset Editor - 2D View window: A profile view of all soundings within the subset slice of the subset area.

• Subset Editor toolbar: The tools used in the Subset Editor.

See 3D View for more information on each of the components.

Load a Subset

To launch the Subset Editor:

1. Select the Subset Editor command.

2. Click and drag in the Display window to draw a bounding box around the subset of data you want to view in the Subset Editor.

Data is loaded to the Subset Editor View windows.

The size of the subset is determined by the bounding box. The subset slice box (yellow area within the bounding box) determines the area that is displayed in the Subset Editor - 2D View. As the bounding box area is changed, a new subset is generated and the displays in the 2D and 3D Views are refreshed.

Below is an example of the subset bounding box.

To resize the subset area:

1. Position the cursor over a corner-grip of either the subset bounding box or the subset slice box.

2. Press and hold the mouse button and drag the grip.

The box is resized as the grip moves.

You can also move the 2D subset slice up or down inside the bounding box by pressing the arrow keys on the keyboard.

To rotate the subset area:

1. Press and hold the <Ctrl> key.

2. Position the cursor over any of the grips on the bounding box. Note the change to the cursor.

3. Press and hold the mouse button, and then drag to rotate the bounding box to the desired angle.

Lock the Subset

Once the desired subset is loaded, the Lock option can be used to lock the subset area ensuring that you do not accidentally resize or move the subset. A new subset cannot be created while the lock is active.

1. Select the Lock command.

The subset area is now locked into place and cannot be adjusted until the lock is removed.