Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2008
Publication_Time: Unknown
Title:
EAARL Coastal Topography - Northern Gulf of Mexico, 2007: Bare earth
Edition: first
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: Data Series
Issue_Identification: 400
Publication_Information:
Publication_Place: Saint Petersburg, FL
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/ds/400/
Description:
Abstract:
A bare earth elevation map (also known as a Digital Elevation Model, or DEM) of the northern Gulf of Mexico barrier islands and Naval Live Oaks was produced from remotely sensed, geographically referenced elevation measurements cooperatively by the U.S. Geological Survey (USGS), the National Park Service (NPS), and the National Aeronautics and Space Administration (NASA). Elevation measurements were collected over the area using the NASA Experimental Advanced Airborne Research Lidar (EAARL), a pulsed-laser ranging system mounted onboard an aircraft to measure ground elevation, vegetation canopy, and coastal topography. The system uses high-frequency laser beams directed at the Earth's surface through an 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 plane travels over the target area at approximately 50 meters per second at an elevation of approximately 300 meters. The EAARL, developed by NASA at Wallops Flight Facility in Virginia, measures ground elevation with a vertical resolution of 15 centimeters. A sampling rate of 3 kilohertz or higher results in an extremely dense spatial elevation dataset. Over 100 kilometers of coastline can be surveyed easily within a 3- to 4-hour mission. When subsequent elevation maps for an area are analyzed, they provide managers with a useful tool to make management decisions regarding land development.
For more information on Lidar science and the Experimental Advanced Airborne Research Lidar (EAARL) system and surveys, see
http://ngom.usgs.gov/dsp/overview/index.php and
http://ngom.usgs.gov/dsp/tech/eaarl/index.php .
The purpose of this project was to produce a highly detailed and accurate bare earth digital elevation map of the northern Gulf of Mexico barrier islands for use as a management tool and to make these data available to natural resource managers and research scientists.
Supplemental_Information:
Unprocessed Lidar data are not in a format that is generally usable by resource managers and scientists. Converting dense Lidar elevation data into a readily usable format without loss of essential information requires specialized processing. The U.S. Geological Survey's Coastal and Marine Geology (CMG) Program has developed custom software to convert unprocessed Lidar data into a GIS-compatible map product to be provided to GIS specialists, managers, and scientists. The primary tool used in the conversion process is Advanced Lidar Processing System (ALPS), a multi-tiered processing system developed by a USGS-NASA collaborative project. Specialized processing algorithms are used to convert unprocessed waveform Lidar data acquired by the EAARL to georeferenced spot (x,y,z) returns for "bare earth" topography. These data are then converted to the North American Datum of 1983 and the North American Vertical Datum of 1988 (using the GEOID 03 model). The files are in the Quarter-Quad tiling format and are named after the U.S. Geological Survey Alpha Quarter-Quad naming convention ('QQ_naming_convention.doc'). The development of custom software for creating these data products has been supported by the U.S. Geological Survey CMG Program's Decision Support for Coastal Parks, Sanctuaries, and Preserves project. Processed data products are used by the U.S. Geological Survey CMG Program's National Assessments of Coastal Change Hazards project to quantify the vulnerability of shorelines to coastal change hazards such as severe storms, sea-level rise, and shoreline erosion and retreat.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20070627
Ending_Date: 20070630
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.25
East_Bounding_Coordinate: -87
North_Bounding_Coordinate: 30.6
South_Bounding_Coordinate: 29.75
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:922b2ecd-cbdf-4993-9f2a-53f2c4b4efcc
Theme:
Theme_Keyword_Thesaurus: ISO Topic Keywords 19115
Theme_Keyword: elevation
Theme:
Theme_Keyword_Thesaurus: http://remotesensing.usgs.gov/
Theme_Keyword: Lidar
Theme_Keyword: Experimental Advanced Airborne Research Lidar
Theme_Keyword: EAARL
Theme_Keyword: Digital Elevation Model
Theme_Keyword: elevation change
Theme_Keyword: laser altimetry
Theme_Keyword: derived surface
Theme_Keyword: resource management
Theme_Keyword: ALPS
Theme_Keyword: Advanced Lidar Processing System
Theme_Keyword: Hurricanes
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: distributions
Theme_Keyword: bathymetry and elevation
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) Keywords
Theme_Keyword: altimetry
Theme_Keyword: topographic mapping
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: LIDAR
Theme_Keyword: topography
Theme_Keyword: digital elevation models
Place:
Place_Keyword_Thesaurus: http://nationalmap.gov/
Place_Keyword: Florida
Place_Keyword: Mississippi
Place_Keyword: Alabama
Place_Keyword: Gulf of Mexico
Place_Keyword: Cat Island
Place_Keyword: Petit Bois Island
Place_Keyword: Dauphin Island
Place_Keyword: Chandeleur Islands
Place_Keyword: Horn Island
Place_Keyword: Ship Island
Place_Keyword: Santa Rosa Island
Place_Keyword: Perdido Key
Place_Keyword: Naval Live Oaks
Stratum:
Temporal:
Access_Constraints: None
Use_Constraints:
The U.S. Geological Survey, National Park Service, and National Aeronautics and Space Administration request to be acknowledged as originators of this data in future products or derivative research.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Jacobs Technology, contracted to USGS
Contact_Person: Amar Nayegandhi or John Brock at USGS
Contact_Position: Computer Scientist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: Saint Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-803-8747 (x3026)
Contact_Electronic_Mail_Address: anayegandhi@usgs.gov
Contact_Electronic_Mail_Address: jbrock@usgs.gov
Hours_of_Service: M-F 8:30-5:00 EST
Browse_Graphic:
Browse_Graphic:
Data_Set_Credit:
Acknowledgement of the U.S. Geological Survey, Florida Integrated Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgement as is standard for citation and legal practices for data source is expected by users of this data. Sharing new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.
Security_Information:
Security_Classification_System: Unclassified
Security_Classification: Unclassified
Security_Handling_Description: none
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcMap 9.2.2.1350
Cross_Reference:
Citation_Information:
Originator: Nayegandhi, A., Brock, J.C., Wright, C.W
Publication_Date: 2009
Title:
Small footprint, waveform-resolving lidar estimation of submerged and sub-canopy topography in coastal environments
Series_Information:
Series_Name: International Journal of Remote Sensing
Issue_Identification: 30(4), p. 861-878
Publication_Information:
Publication_Place: London
Publisher: Taylor and Francis
Cross_Reference:
Citation_Information:
Originator:
Brock, J.C., Wright, C.W., Sallenger, A.H., Krabill, W.B., and Swift, R.N.
Publication_Date: 2002
Title:
Basis and methods of NASA Airborne Topographic Mapper lidar surveys for coastal studies
Edition: 18(1), pp. 1-13
Series_Information:
Series_Name: Journal of Coastal Research
Issue_Identification: 18(1), p. 1-13
Publication_Information:
Publication_Place: Florida
Publisher: Coastal Research and Education Foundation, Inc.
Cross_Reference:
Citation_Information:
Originator: Sallenger, A.H., Wright, C.W., and Lillycrop, J.
Publication_Date: 2005
Title:
Coastal impacts of the 2004 hurricanes measured with airborne Lidar; initial results
Edition: 73(2-3), p. 10-14
Series_Information:
Series_Name: Shore and Beach
Issue_Identification: 73(2-3), p. 10-14
