LIDAR DEMS - Light Detection and Ranging (LiDAR)The LIDAR collection has been acquired by the USGS through contracts, through partnerships with other Federal, state, tribal, or regional agencies, from direct purchases from private industry vendors, and through volunteer contributions from the science community. Product specifications such as nominal pulse spacing, area of coverage (footprint), file size, and projection will vary by project since the data come from a variety of sources. The USGS EROS Center manages and distributes LIDAR point cloud data dating back to 2000 for projects from across the United States.