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Targets are Painted

LIDAR Paint Mapping - GEOINT

"Lidar (/ˈlaɪdɑːr/, also LIDAR, LiDAR, and LADAR) is a method for measuring distances (ranging) by illuminating the target with laser light and measuring the reflection with a sensor. Differences in laser return times and wavelengths can then be used to make digital 3-D representations of the target. It has terrestrial, airborne, and mobile applications."

Dig>>

https://coast.noaa.gov/inventory/

https://geodetics.com/drone-based-lidar-photogrammetry-systems/

Lidar Point Cloud - USGS National Map 3DEP Downloadable Data Collection

https://catalog.data.gov/dataset/lidar-point-cloud-usgs-national-map