|1996-2000 NOAA/USGS/NASA Airborne LiDAR Assessment of Coastal Erosion (ALACE) Project
for the US Coastline
|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.