Display

Common Functionality User Guide

Laser : Display

The display group is used to manipulate the display characteristics of the laser data displayed in the 3D View. Manipulating the point cloud in the 3D view allows the user to increase the resolution of areas of interest, and filter out information that is not relevant at that moment in time. The point cloud can be clipped and refined based on user preference, or by defined limits.

Edge Mode

On the Laser tab, in the Display group, click Edge Mode to toggle on and off the accentuation of edges in the laser model within the 3D view display.

Optimise Contrast

On the Laser tab, in the Display group, click Optimise Contrast to cycle through a number of contrast values applied to the laser data, this can aid the display of laser data in some situations.

Low Density Points

On the Laser tab, in the Display group, click Low density points to switch on or off the display of low density laser data.

A laser model can cover a large extent area and have a large amount of data, the laser server will not display the entire laser captured area in full resolution. The display will contain a sub sample of the laser data at any one time; the user can define a region of interest and increase the point density within that region using the volume selection tools.

With the low resolution point cloud displayed the user will be able to view the full extents of the facility. However, it is not always appropriate to view the full extents. With the low resolution points turned off the user will only see the point cloud within the defined volume, providing a clearer, unobstructed view of the area of interest.

Polygon Fence

The user can choose to clip the laser data being displayed by using an irregular boundary. On the Laser tab, in the Display group, click Polygon Fence, use the Screen Pick filter to define the outline, each polygon fence boundary definition limit the extents of the resultant volume.

In the following example setting two clip boundaries removes the unnecessary laser data from the display.

Options

As the laser model is a survey of a large area, the user can focus on a region of the laser data and increase point density within that region. On the Laser tab, in the Display group, click Options to display the Laser - Region Of Interest window, which allows the user to define the volume.

To define the volume, click CE Volume or Pick Volume within the display. The Positioning Control window is displayed, when Laser Data is selected, it applies filter to the cursor. The user can only pick laser data in the 3D view. Once the user has defined the volume, it can be modified by entering the new values within the Laser - Region Of Interest window or grabbing the axis handles within the 3D view.

Any changes in either the Laser - Region Of Interest window or the 3D view are updated vice versa. For example the user drags the handle on the 3D view and the Laser - Region Of Interest window will update or the user updates the Laser - Region Of Interest window and the 3D view will update.

The Set view quality option allows the user to set the point density within the region of interest. The point density cannot be defined in absolute terms as a High point density, for a small volume this will result in a higher point density than for a large volume. Select from the Inside drop-down list the quality of the density points.

The volume defined in the Laser - Region Of Interest window is reflected within the 3D view as a box.

Display Reset

Having set the region of interest or the polygon fence, on the Laser tab, in the Display group, click Display reset to reset the volumes defined and reset the complete display of the laser data to low density points. As a result, if low density points have been switched off the display of laser data will be removed. Toggle the low resolution points back On to reinstate the low resolution points.