Use this tool to select existing segments within a point cloud. Segments are clusters of points that share a (non-zero) segment ID attribute. Points can be clustered using the segmentation tool.
The goal of segmentation is to represent features within a point cloud, so selecting by segment is typically an easy way to select features with just one click. Points selected via segment function the same as points selected "normally" via the digitizer tool. They can be copied to a new layer, manually classified, used for classification training, and more.
To open this tool, first change the Lidar Draw Mode to Color Lidar by Segment, then select this button from one of its locations:
- The Selection dropdown menu in the Lidar toolbar
- Within the Digitizer Toolset
| This function requires Global Mapper Professional |
Steps for using the Select Lidar Segments tool
1. Change the Draw Mode to Color Lidar by Segment.
-
Each segment is assigned a different color at random.
-
Points that aren't in a segment are gray.
2. With the Select Lidar Segments tool active, select a Lidar point.
-
All other Lidar points with the same Segment ID are selected.
-
Selected points are highlighted in red.
-
Hold the CTRL key down to select multiple segments at a time.
Lidar Returns in Selected Segment(s)
To select segments present in previously selected points, use the Lidar Returns in Selected Segment(s) option in the Digitizer Toolset in the Advanced Selection dropdown. First select points in the workspace, then choose Lidar Returns in Selected Segment(s) and click the Select button. This will select any segments within the current selection of point features.