USGS UAS pilot conducts lidar mapping flight over Ackerson Meadow in November 2023

In November 2023, the U.S. Geological Survey (USGS) National Uncrewed Systems Office (NUSO) collected uncrewed aircraft system (UAS) lidar data at Ackerson Meadow in Yosemite National Park in California. These UAS surveys provided essential data to USGS and National Park Service (NPS) scientists during the initial phase of large-scale ecosystem and channel restoration. UAS lidar data captures detailed information about topography, vegetation, and habitat structure. By collecting repeat scans as restoration activities proceed and vegetation regrowth occurs, researchers will compare pre- and post- restoration conditions at Ackerson Meadow. In this photo, USGS remote pilot Mark Bauer wears an orange high-visibility vest while flying the UAS with its lidar payload over the meadow surrounded by forested areas and mountains in the distance. Note that these UAS lidar flights were conducted to support ecological restoration science at Yosemite National Park; USGS personnel worked closely with the NPS for authorization. Recreational UAS use is prohibited at Yosemite National Park.