This data set includes data collected from 1996-2000 and covers the states of AL,FL,LA,MS,DE,MD,VA,CT,MA,ME,NH, NJ,NY,RI,NC,SC,GA,CA OR,WA,TX OH,PA. Laser beach mapping uses a pulsed laser ranging system mounted onboard an aircraft to measure ground elevation and coastal topography. The laser emits laser beams at high frequency and is directed downward at the earth's surface through a port opening in the bottom of the aircraft's fuselage. The laser system records the time difference between emission of the laser beam and the reception of the reflected laser signal in the aircraft. The aircraft travels over the beach at approximately 60 meters per second while surveying from the low water line to the landward base of the sand dunes. ACCESS CONSTRAINTS: None, USE CONSTRAINTS: This data was collected for the purposes of research. Any conclusions drawn from analysis of this information are not the responsibility of NOAA or the Coastal Services Center. This data is likely to contain returns from the water surface and vegetation. No processing has been done to remove returns from water or vegetation. Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations., DISTRIBUTION LIABILITY: This data was collected for the purposes of research. Any conclusions drawn from analysis of this information are not the responsibility of NOAA, the Coastal Services Center, or it's partners. Unknown Unknown 20080206 Elevation lidar, laser, beach, Bathymetry/Topography, digital elevation model, DEM, erosion Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce 47.885630 degrees_north -69.692954 degrees_east 19961009 20001102 Point