The data were acquired in March 2005 using the NASA Experimental Advanced Airborne Research Lidar (EAARL) platform in Sussex County, Delaware. Once acquired, the data were processed by USGS personnel into both 2-foot contours and digital elevation models. Multiple returns were recorded for each laser pulse. This is a bare earth data set. The points have approximately a 3 m ground spacing. Water points remain in the bare earth data set, they have not been classified as water. Original contact information: Contact Org: Delaware Geological Survey Phone: 302-831-2833 Email: delgeosurvey@udel.edu This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data.