High resolution LiDAR Data for Hog Island, VA, 2013

High Resolution LiDAR elevation and nearshore bathymetry data for Hog Island, Northampton County, VA, collected on May 26, 2013 on behalf of the USACE Engineer Research and Development Center using the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Hyperspectral imagery is provided as a separate VCRLTER dataset. Four data entities are included here: (1) the LiDAR point cloud (approximate point density of 5-30 points per square meter [denser over structures and dense vegetation]) in standard LiDAR LAS file format; (2) a rasterized digital elevation model (DEM) derived from the point cloud depicting elevation of the water-free first return surface with a cell resolution of 1 meter; (3) a DEM of the same first return surface with a cell resolution of 5 meters; and (4) a DEM depicting the bare earth surface with vegetation and structures removed, at a 1 meter resolution. DEMs are in georegistered TIFF format. ArcGIS and FGDC metadata files in XML format are also included. To obtain vegetation and building heights, subtract the bare earth model from the surface model. Areas of open water with sparse or no bottom returns (either due to water depth or clarity issues) are masked out in the DEM data.