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USGS CMG A-2-04-FL Metadata

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ID A-2-04-FL
Also Known As EAARL Lidar
Abstract United States Geological Survey, St. Petersburg, Florida,National Park Service,National Aeronautics and Space Administration. LIDAR data (LIDAR) of field activity A-2-04-FL in Dry Tortugas National Park, FL from 01/01/2004 to 01/01/2004
Organization United States Geological Survey, St. Petersburg, Florida
National Park Service
National Aeronautics and Space Administration
Activity Type LIDAR
Platform Airplane
Area of Operation Dry Tortugas National Park, FL, Florida
Bounding Coordinates
-83.55000     -80.25000
Dates 01/01/2004 (JD 001) to 01/01/2004 (JD 001)
Analog Materials list
Information Specialist
Jerry Butcher
Equipment Used
One objective of this research is the creation of techniques for the
surveying of coral reefs for the purposes of habitat mapping, ecological
monitoring, change detection, and event assessment (e.g., bleaching,
hurricanes, disease outbreaks, etc.). As part of this project, data from an
innovative instrument developed at NASA Wallops Flight Facility, the NASA
Experimental Airborne Advanced Research Lidar (EAARL), was used.  This sensor
has the potential to make significant contributions in this realm for
measuring water depth and conducting cross-environment surveys.  High spectral
resolution, water-column correction, and low costs were found to be key
factors in providing accurate and affordable imagery to managers of coastal
tropical habitats.
Information to be Derived
Measure subaerial and submarine coastal topography
Raw lidar data is not in a format that is generally usable by
Park Service resource managers and scientists for scientific analysis.
Converting dense lidar elevation data into a readily usable format without
loss of essential information requires specialized processing.  The USGS
converts raw lidar data into a GIS-compatible map product to be provided to
National Park Service GIS specialists, managers, and scientists.  The primary
tool used in the conversion process is Airborne Lidar Processing System
(ALPS), a multi-tiered processing system developed by a USGS/NASA
collaborative project for the use of subaerial and submarine lidar in coastal
change assessment.  Specialized processing algorithms are used to convert raw
waveform lidar data acquired by the EAARL to georeferenced spot (x,y,z)
returns for submarine topography.  These data are then converted to the NAD83
horizontal and NAVD88 vertical datum (using the Geoid 99 model). The final
products are 2x2-km map tiles written out in a standard geotiff format with
associated metadata information. These tiles are created for visual
interpretation and regional quantitative analysis. Metadata files include the
standard FGDC format.
Brock, J.C., Wright, C.W., Patterson, Matt, Nayegandhi, Amar, and Patterson, 
Judd, 2006, Dry Tortugas National Park, U.S. Geological Survey Open File Report 
publication html
Got Help? For A-2-04-FL, we would appreciate any information on -- chief scientist, contract, crew, days at sea, dive count, funding, kms of navigation, national plan, NGDC Info, notes, owner, ports, project, project number, scanned materials, seismic description, station count, station description, submersible, tabulated info.
Type Webpage KMZ Arc         Metadata        
Metadata data     txt  data  FAQ  xml
Navigation data nav    
Times   050.times    

A-2-04-FL location map of where navigation 

equipment operated

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