50104
2007 USGS/NASA Experimental Advanced Airborne Research Lidar (EAARL): Fire Island National Seashore, NY and Sandy Hook, NJ
usgs2007_ne_bi_m521_metadata
Data Set
Published / External
49401
Lidar - partner (no harvest)
Project
Completed
2008
ASCII xyz point cloud data were produced from remotely sensed, geographically referenced elevation measurements cooperatively
by the U.S. Geological Survey (USGS) and National Aeronautics and Space Administration (NASA). Elevation measurements were
collected over the barrier island areas of Nassau and Suffolk Counties (Fire Island Natational Seashore)in New York and Monmouth County
(Sandy Hook) in New Jersey, 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 time period. When subsequent elevation maps for an area are analyzed, they provide a useful
tool to make management decisions regarding land development.
Original contact information:
Contact Name: Amar Nayegandhi
Contact Org: Jacobs Technology, U.S. Geological Survey, FISC
Title: Computer Scientist
Phone: 727-803-8747 (x3026)
Email: anayegandhi@usgs.gov
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 northeast coastal barrier islands for use as a management tool and to
make these data available to natural resource managers and research scientists.
10748
Raw 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 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.
Theme
ISO 19115 Topic Category
elevation
Theme
ALPS
Theme
EAARL
Theme
bare earth
Temporal
2007
Temporal
April
Temporal
May
Office for Coastal Management
Charleston
SC
Data Set
None Planned
Binary lidar data file for xyz data points.
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 1ns time-resolved return intensity waveform (digital counts).
Z value is referenced to orthometric elevations derived from National Geodetic Survey Geoid Model, Geoid03.
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 herein 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.
Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.
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. These data are not legal documents and are not to be used as such. 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.
Data Steward
2008
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2008
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2008
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2008
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-74.02031
-71.854012
41.072956
40.394056
Discrete
2007-04-26
Discrete
2007-04-29
Discrete
2007-04-30
Discrete
2007-05-15
Discrete
2007-05-16
Yes
Unclassified
Unclassified
None
This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer;
None
Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no
longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its
limitations.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=521
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/521/index.html
Bulk Download
Simple download of data files.
https://coast.noaa.gov
Online Resource
https://coast.noaa.gov/dataviewer
Online Resource
2016-05-23
Date that the source FGDC record was last modified.
2017-11-14
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.
2018-02-08
Partial upload of Positional Accuracy fields only.
2018-03-13
Partial upload to move data access links to Distribution Info.
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcMap 9.2.2.1350
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.
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.
Several regions of the dataset are labeled as "No Data" which corresponds to a cell value of -32767 m in the ASCII 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.
The files are in the Quarter-Quad tiling format and the exact tile location is contained in the filename at n88_########_mf_be/fs
where ####### is the Quarter-Quad tile ID.
See QQ_naming_convention.doc in the 'extras' directory.
1
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, St. Petersburg, Florida office 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).
2007-01-01T00:00:00
2
Metadata imported into ArcCatalog from XML file.
2008-08-18T00:00:00
3
The NOAA Office for Coastal Management (OCM) received files in LAS format. The files contained LiDAR intensity and elevation measurements.
OCM performed the following processing on the data to make it available within Digital Coast:
1. The data were converted from UTM Zone 18 coordinates to geographic coordinates.
2. The data were converted from NAVD88 heights to ellipsoid heights using Geoid03.
3. The LAS header fields were sorted by latitude and updated.
2009-11-01T00:00:00
gov.noaa.nmfs.inport:50104
Anne Ball
2017-11-15T15:24:18
SysAdmin InPortAdmin
2022-08-09T17:11:38
2022-03-16
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16