U.S. Geological Survey
2008
EAARL Topography-Jean Lafitte National Historical Park and Preserve 2006
first
remote-sensing image
U.S. Geological Survey Data Series
389
Saint Petersburg, FL
U.S. Geological Survey
http://pubs.usgs.gov/ds/389/
A first surface/bare earth elevation map (also known as a Digital Elevation Model, or DEM) of the Jean Lafitte National Historical Park and Preserve in Louisiana 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 easily surveyed within a 3- to 4-hour mission. 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 purpose of this project was to produce a highly detailed and accurate first surface/bare earth elevation map of the Jean Lafitte National Historical Park and Preserve in Louisiana for natural resource managers and research scientists.
Raw Lidar data are 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 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 Airborne 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 GEOID03 model). Each file contains data located in a 2-km by 2-km tile, where the upper-left bound can be assessed quickly through the file name. The first 3 numbers in the file name represent the left-most UTM easting coordinate (e###000) in meters, the next 4 numbers represent the top-most UTM northing coordinate (n####000) in meters, and the last 2 numbers (##) represent the UTM zone in which the tile is located (for example, fs_e123_n4567_15).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.
20060922
ground condition
None planned
-90.25
-90.075
29.875
29.725
USGS Metadata Identifier
USGS:67020ad2-20af-4982-b239-8d01a8d964fb
ISO Topic Keywords 19115
elevation
http://remotesensing.usgs.gov
Airborne Lidar Processing System
ALPS
EAARL
Digital Surface Model
DSM
EAARL
Experimental Advanced Airborne Research Lidar
laser altimetry
LIDAR
remote sensing
topography
Data Categories for Marine Planning
distributions
bathymetry and elevation
Marine Realms Information Bank (MRIB) Keywords
altimetry
topographic mapping
USGS Thesaurus
LIDAR
topography
digital elevation models
http://nationalmap.gov
Jean Lafitte National Historical Park and Preserve
Jean Lafitte
Louisiana
http://lidar.cr.usgs.gov
First Surface/Bare Earth
http://www.esri.com/news/arcuser/1104/temporal.html
2006
None
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.
Jacobs Technology, U.S. Geological Survey, FISC, St. Petersburg, FL
Amar Nayegandhi
Computer Scientist
mailing and physical address
600 4th Street South
Saint Petersburg
FL
33701
USA
727-803-8747 (x3026)
anayegandhi@usgs.gov
jbrock@usgs.gov
M-F 8:30-5:00 EST
http://pubs.usgs.gov/ds/389/html/images/JELA_bounds.jpg
EAARL Topography–Jean Lafitte National Historical Park and Preserve 2006
JPG
Acknowledgment 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 acknowledgment as is standard for citation and legal practices for data source is expected. Sharing of 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.
Unclassified
Unclassified
None
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcMap 9.2.2.1350
Nayegandhi, A., Brock, J.C., Wright, C.W
2008
Small footprint, waveform-resolving lidar estimation of submerged and subcanopy topography in coastal environments
International Journal of Remote Sensing
30(4), pp. 861-878
Brock, J.C., C.W. Wright, A.H. Sallenger, W.B. Krabill, and R.N. Swift
2002
Basis and methods of NASA Airborne Topographic Mapper lidar surveys for coastal studies
18(1), pp. 1-13
Journal of Coastal Research
18(1), p. 1-13
The expected accuracy of the measured variables is as follows: attitude within 0.07 degree, 3 cm nominal laser ranging accuracy, and vertical elevation accuracy of +/-15 cm for the topographic surface. Quality checks are built into the data-processing software.
unknown
Several regions of the dataset are labeled as "No Data", which corresponds to a cell value of -32767 m in the GeoTIFF file. These "No Data" areas are a result of the survey not covering a particular region, optical water depth of greater than 1.5 Secchi disc depths, or the manual removal of lidar processing artifacts.
Raw elevation measurements have been determined to be within 1 meter horizontal accuracy.
Elevations of the DEM are vertically consistent with the point elevation data, +/-15 cm.
U.S .Geoloigcal Survey
2008
EAARL Topography--Jean Lafitte National Historical Park and Preserve 2006
remote-sensing image
U.S. Geological Survey Data Series
389
St. Petersburg, FL
U.S. Geological Survey
Point elevation measurements collected by the EAARL sensor.
20060922
ground condition
none
none
The data are collected using a Cessna 310 aircraft. The NASA Experimental Advanced Airborne Research Lidar (EAARL) laser scanner collects the data using a green (532-nm) raster scanning laser while a digital camera acquires a visual record of the flight. The data are stored on hard drives and archived at the U.S. Geological Survey, FISC office in St. Petersburg, FL, and the NASA office at Wallops Flight Facility in Virginia. The navigational data are processed at Wallops Flight Facility. The navigational and raw data are then downloaded into the Advanced Lidar Processing System (ALPS). Data are converted from units of time to x,y,z points for elevation. The derived surface data can then be converted into raster data (GeoTIFFs).
20080715
Jacobs Technology, U.S. Geological Survey, FISC, St. Petersburg, FL
Amar Nayegandhi
Computer Scientist
mailing and physical address
600 4th Street South
Saint Petersburg
FL
33703
USA
727-803-8747 (x3026)
anayegandhi@usgs.gov
M-F, 8:00-5:00 EST
Metadata imported into ArcCatalog from XML file.
20080715
U.S. Geological Survey
Xan Yates
Metadata Specialist
mailing and physical address
600 4th Street South
Saint Petersburg
FL
33701
USA
727-803-8747 (x3086)
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
20170124
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20201013
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Raster
Pixel
106
173
1
Universal Transverse Mercator
15
0.999600
-93.000000
0.000000
500000.000000
0.000000
row and column
2.000000
2.000000
meters
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
North American Vertical Datum of 1988
0.15 m
meters
Explicit elevation coordinate included with horizontal coordinates
This Digital Elevation Model is a GeoTIFF derived from point data. It is raster data consisting of cells. Each cell has an elevation value associated with it.
The variables measured by EAARL are distance between aircraft and GPS satellites (m), attitude information (roll, pitch, heading in degrees), scan angle (degrees), second of the epoch (sec), and 1-ns time-resolved return intensity waveform (digital counts). Z value is referenced to orthometric elevations derived from National Geodetic Survey Geoid Model, GEOID03.
U.S. Geological Survey
Project Manager
Project Manager
mailing address
600 4th Street South
Saint Petersburg
FL
33701
USA
727 803-8747 (x3026)
M-F, 8:00-5:00 EST
DS 389
This DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herin to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
TIFF
2
GeoTIFF
http://pubs.usgs.gov/ds/389/data_files/be/
http://pubs.usgs.gov/ds/389/data_files/fs/
Data can be downloaded via the World Wide Web (WWW)
DVD
DVD
vary
Contact U.S. Geological Survey
vary
Contact U.S. Geological Survey for details
20060922
20211109
United States Geological Survey, St. Petersburg Coastal and Marine Science Center
SPCMSC Data Management Group
mailing and physical address
600 4th Street South
St. Petersburg
Florida
33701
US
727-502-8000
gs-g-spcmsc_data_inquiries@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998