Activating the Lidar Module will add the Lidar Toolbar as an additional component to the Global Mapper User Interface.
This tool requires a Lidar Module license.
Like other Global Mapper toolbars, this interface may be activated and deactivated in the View > Toolbars menu. See Toolbars Sub-Menu for more information on enabling toolbars and customization.
On the toolbar are options to change the draw or color mode, quickly classify or re-classify selected points, and
auto-classify Lidar points.
Lidar
Lidar (Manual Classification)
Lidar Draw Mode
The Lidar Toolbar features a drop down menu for changing the draw or color mode of displayed lidar points, which allows users to easily select the display characteristics of the point cloud.
Automatic Classification
The automatic classification options available on the toolbar are:
Auto-Classify Noise Points
Can be used to automatically classify Noise points based on user-defined parameters.
Auto-Classify Ground Points
Specify the minimum height in meters (above the local average) that a point has to be in order to be considered a non-ground point.
Auto-Classify Non-Ground Points
Specify point spacing and threshold values such as Minimum Height, Vegetation Distance, and Maximum Co-Planar Distance to automatically classify non-ground point features.
Extract Vector Features
Extract building polygons, tree points or polygons, and/ or powerlines from classified Lidar data.
Create 3D Model from Selected Lidar Points
Convert the selected lidar points into a 3D mesh surface.
Additional Tools
Lidar QA - Compare/ Adjust Elevations to Control Points
Control points may be compared to nearby Lidar points. This tool reports the differences and RMSE between the control points and nearby LiDAR points. It can also be used to adjust the point cloud so the points match the control elevations.
Filter Lidar Data
Allows the user to filter out Lidar points by Classification. Also allows for changing the color or classification groups of Lidar classes. See more information on changing the Class properties. Additional Advanced Filtering tools can be applied while running an auto-classification, or by selecting Lidar Points with the digitizer tool.
Apply Color to Lidar Points
Applies color values from loaded imagery to Lidar points based on X, Y location values. Color values can include R,G,B values from true color imagery, or values from multi-band imagery or raster calculations for LAS versions 1.4.
Manually Classifying Points
The Lidar Module
also allows the user to manually classify or re-classify selected Lidar points.
To use the classification buttons found on the Lidar Toolbar,
select a group of lidar points with the Digitizer Tool
and click on the button corresponding to the classification you wish to use.
The manual classification options available on the toolbar are:
Classify Selected Lidar Points – Ground
Classify Selected Lidar Points – Vegetation Low
Classify Selected Lidar Points – Vegetation Medium
Classify Selected Lidar Points – Vegetation High
Classify Selected Lidar Points – Building
Classify Selected Lidar Points – Wire (Conductor)
Classify Selected Lidar Points – Water
Classify Selected Lidar Points – High Noise
Classify Selected Lidar Points – Model Key-point
Change Lidar Class
Change Class of Lidar Points
Select Lidar points with the digitizer prior to selecting this tool from the Lidar Toolbar or select the tool and use Modify Search Bounds to specify the area of Lidar Points for which to change the class. In the Lidar Change Class dialog select the classes of points to change the classification of and select the new classification.