LiDAR Point Cloud Manager

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The LiDAR Point Cloud Manager analyzes the vegetation within the forest and creates a vegetation raster map. The analysis based on a ocdLas file created when importing las files in DEM Import Wizard.

Load

This function loads an OCAD LAS file (*.ocdLas) and opens the LiDAR Point Cloud Manager.

The OCAD LAS file is a LiDAR point cloud in an OCAD internal file format created in the DEM Import Wizard. This file is optimized for fast access to the LiDAR points.

For more information about this file open the Information dialog.

Info

This function shows information about ocdLas file.

LidarPointCloudManager Information.png

When moving the mouse cursor over the file name then the full file path appears.

Show Frame

This function shows a red rectangle with the extent of the loaded ocdLas file.

LidarPointCloudManager ShowFrame.png

Close

This function closes ocdLas file.

Manage

This function reopens the LiDAR Point Cloud Manager with the already loaded ocdLas file.

Point Cloud

This functions shows the LiDAR point cloud as image according to the settings in filtering options.

LidarPointCloudManager PointCloud.png

It is the same extent as on the drawing area. The pixel size depends on the zoom level in the drawing area. When moving the cursor over the point cloud image the coordinate of the mouse cursor is shown in the status bar.

In the Filtering tab there are four different display options: Classification, Intensity, Height over ground and Vegetation density.

Classification

This option shows the classification of the LiDAR points. If more then one point is inside one cell then the point with the higher priority is shown. For example, the class Building has higher priority than Vegetation and Ground has the lowest priority.

LidarPointCloudManager Classification.png

Intensity

This option shows the intensity of the LiDAR points. Lower intensity is drawn with darker color. In this image the different types of vegetation (deciduous and coniferous forest) and the vegetation boundaries are visible.

LidarPointCloudManager Intensity.png

Height over ground

This option shows the maximum height above ground for each cell. In this image high trees and vegetion boundaries are visible.

LidarPointCloudManager HeightOverGround.png

Vegetation density

This option shows the number of LiDAR point for each cell. Cells with more points are shown in darker red. Open areas have often less return points and appears therefore in lighter red.

LidarPointCloudManager VegetationDensity.png

Click the Save button to create a geo-referenced png file and load it as new background amp. The file is automatically saved in the same folder as the ocd file.

Classification

Return Type

Height Above Ground

Profile

The profile shows the vegetation structure.

Draw a straight line in the drawing area inside the loaded ocdLas file and select the line object.

Choose the profile width and click the Show button. OCAD draws the profile according the filter settings in the Filtering tab.

LidarPointCloudManager Profile.png

Raster Map

Statistics