Need to find a Survey Marker to match up your LiDAR and other Aerial Imagery? Check out the NGS Data Explorer. Zoom into your project area. Use the map layers tool on the left to "Find Marks". Then select a Survey Marker to view info such as height and type.
Calculating the difference between bare earth and first return lidar rasters provides information such as forest canopy height and character, building heights and orientation, aboveground utility alignment, a count of cars on the road, and even estimates of large livestock in a field