Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 20081027
Publication_Time: 0900
Title: EAARL Coastal Topography-Northern Gulf of Mexico
Edition: first
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: Data Series
Issue_Identification: 384
Publication_Information:
Publication_Place: FISC Saint Petersburg
Publisher: U. S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/ds/384/
Description:
Abstract:
ASCII xyz point cloud data were produced from remotely-sensed, geographically-referenced elevation measurements in cooperation with the U.S. Geological Survey (USGS) and National Air 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 kHz or higher results in an extremely dense spatial elevation data set. Over 100 kilometers of coastline can be easily surveyed within a 3 to 4 hour mission time period. When subsequent elevation maps for an area are analyzed, they provide 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 ASCII elevation data can be used to create raster Digital Elevation Models (DEMs). The purpose of this project is to produce highly detailed and accurate digital elevation maps of the post Hurricane Ivan data for use as a management tool and to make this data available to natural resource managers and research scientists.
Supplemental_Information:
Raw lidar data is 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 raw 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 raw waveform Lidar data acquired by the EAARL to georeferenced spot (x,y,z) returns for "first surface" and "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 the exact tile location is contained in the filename at n88_########_mf_be where ####### is the Quarter Quad tile ID.The development of custom software for creating these data products has been supported by the USGS CMG Program's 'Decision Support for Coastal Parks, Sanctuaries, and Preserves' project. Processed data products are used by the USGS 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:
Single_Date/Time:
Calendar_Date: 20040919
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -88.875
East_Bounding_Coordinate: -84.5
North_Bounding_Coordinate: 30.625
South_Bounding_Coordinate: 29.375
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:28ad40f2-b08d-4c0f-982b-5e016e448134
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_Keyword: Ivan
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
Stratum:
Temporal:
Access_Constraints: None
Use_Constraints:
The U.S. Geological Survey and National Aeronautics and Space Administration request to be acknowledged as originators of the 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
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:
The U. S. Geological Survey is providing these data "as is", and the U. S. Geological Survey disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will the U. S. Geological Survey be liable to you or to any third party for any direct, indirect, incidental, consequential, special, or exemplary damages or lost profits resulting from any use or misuse of these data. 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 standad 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 data sets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photo interpretation, 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: unclassified
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: 2008
Title:
Small footprint, waveform-resolving lidar estimation of submerged and subcanopy topography in coastal environments
Series_Information:
Series_Name: International Journal of Remote Sensing
Issue_Identification: 30(4), pp. 861-878
Cross_Reference:
Citation_Information:
Originator:
Brock, J.C., C.W. Wright, A.H. Sallenger, W.B. Krabill, and R.N. Swift
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), pp. 1-13
Cross_Reference:
Citation_Information:
Originator: Sallenger, A.H., C.W. Wright, and J. Lillycrop
Publication_Date: 2005
Title:
Coastal impacts of the 2004 hurricanes measured with airborne lidar; initial results
Edition: 73(2&3), pp. 10-14
Series_Information:
Series_Name: Shore and Beach
Issue_Identification: 73(2&3), pp. 10-14
