D.C. Office of the Chief Technology OfficerNormalised Digital Surface Model - 1m resolution. The dataset contains the Normalised Digital Surface Model for the Washington Area. Voids exist in the data due to data redaction conducted under the guidance of the United States Secret Service. All lidar data returns and collected data were removed from the dataset based on the redaction footprint shapefile generated in 2017.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/eebe3c897720458eb75a5c4e8dbf50d8_0engOpen Data DCPublic2018 LiDAR - Normalized Digital Surface Model - Tiles [District of Columbia--Washington]Web servicesDistrict of Columbia--WashingtonDistrict of Columbia2018