Lidar Configuration

The Lidar section in the Configuration dialog controls the display and interpretation of Lidar classes and Return Types.

Access the Lidar Configuration by selecting the configure button Configuration button from the File Toolbar or Tools menu, and navigating to the Lidar section. These settings are also available from the Filter button of the LiDAR Toolbar.


Turn the display of Lidar classes on or off.

Context Menu

Enable All / Disable All

Use these buttons to quickly select or deselect all Lidar Classifications to make all visible or all filtered.

Return Types and Flag to Display

Turn the display of Return Types on or off, and disable lidar with certain Classification Flags. These settings apply to 3D point clouds that contain multiple returns, such as traditional aerial lidar data. Flags are used in some datasets to identify certain lidar types (Synthetic, Key-point, Overlap, Withheld, Edge of Flight line, None). Uncheck any of these options to keep points of this type from displaying in the active workspace.

Update Return Number/ Count when Deleting Points

This setting will modify the return count (RETURN_CNT) and return number (RETURN_NUM) attributes of points when a point from the same pulse has been marked as deleted.

When a point is undeleted, the original return number and return counts will be restored for the related points.

Pulses Identified by GPS Time and ___

This is an advanced option to modify how Global Mapper identifies that points are part of the same lidar pulse. Select Only GPS Time, or to also use a combination of User Data, Point Source ID or Scanner Channel as the property to determine the point return type along with GPS time.

Restore Default Settings

This will turn all Lidar classes and Return Types on so they are visible, and reset all class names to the default ASPRS classification names.