Name: Lidar Reflectance (3 m)

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Description: This image represents a 1x1 meter reflectivity (intensity) surface for areas inside Buck Island Reef National Monument (BIRNM). Reflectivity is the relative amount of laser light returned from the seafloor. It describes the biology and geology of the seafloor, which is important information when characterizing benthic habitats. LiDAR reflectivity was collected by Fugro LADS, in collaboration with NOAA's Biogeography Branch, the University of New Hampshire and the National Park Service, from 2/21/2011 to 2/22/2011 using LADS (Laser Airborne Depth Sounder) Mark II LiDAR system. Depths between 0 and 49 m were surveyed, producing a 1x1 m bathymetry and 3x3 m reflectivity (intensity) surface. Soundings were positioned relative to the horizontal coordinate system (NAD83 UTM 20 N) and to the vertical coordinate system (MLLW). The reflectivity surface was corrected for losses of light through the air/water interface, the water column, and any system specific losses from filtering and receiver field of view. This reflectivity image (as well as depth, and derivatives from depth) was used to develop a new benthic habitat map for BIRNM in 0 to 50 meters of water.

Copyright Text: Fugro LADS, NOAA/NOS/NCCOS/MSE/Biogeography Branch, National Park Service & University of New Hampshire

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