ASPRS Vertical Accuracy Reporting for Lidar Data identifies the vertical accuracy reporting requirements that are recommended by the American Society for Photogrammetry and Remote Sensing (ASPRS) when analyzing elevation data generated using airborne light detection and ranging or laser radar (lidar) technology. They are harmonized with the relevant sections of the Guidelines for Digital Elevation Data (Version 1.0) released by the National Digital Elevation Program (NDEP).