lidaratm2.txt is an ASCII file, comma separated, containing longitude, latitude, and elevation data. It is in datum NAVD88 (geographic coordinates). It the area of Jockey's Ridge, NC, near Nags Head. These are raw data with few outliers with elevations over 100m, use d.sites.qual to extract points with elevations less than 40m. Date Flown: 991009 (Oct 10, 1999) Gathered by NASA Wallops, Island. Cooperators: NASA, NOAA, USGS. Additional Questions about this data see http://www.csc.noaa.gov/crs/tcm/index.html