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Short Citation:
OCM Partners, 2022: 2006 USGS/NPS/NASA Experimental Advanced Airborne Research Lidar (EAARL): Jean Lafitte National Historical Park and Preserve, https://www.fisheries.noaa.gov/inport/item/50102.

Item Identification

Title: 2006 USGS/NPS/NASA Experimental Advanced Airborne Research Lidar (EAARL): Jean Lafitte National Historical Park and Preserve
Short Name: usgs2006_jean_lafitte_m578_metadata
Status: Completed
Publication Date: 2008
Abstract:

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.

Original contact information:

Contact Name: Amar Nayegandhi

Contact Org: Jacobs Technology, U.S. Geological Survey, FISC, St. Petersburg, FL

Title: Computer Scientist

Phone: 727-803-8747 (x3026)

Email: anayegandhi@usgs.gov

Purpose:

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.

Notes:

10746

Supplemental Information:

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.

A footprint of the data may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/578/supplemental/2006_USGS_NPS_NASA_EAARL_Lidar_Jean_Lafitte_Louisiana.kmz

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None ALPS
None EAARL

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: LAS
Entity Attribute Overview:

LAS v 1.2

Entity Attribute Detail Citation:

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.

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of the Office for Coastal Management

or its partners.

Data Set Credit: 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.

Support Roles

Data Steward

CC ID: 690530
Date Effective From: 2008
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 690532
Date Effective From: 2008
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 690533
Date Effective From: 2008
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 690531
Date Effective From: 2008
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1139303
W° Bound: -90.242045
E° Bound: -90.098559
N° Bound: 29.873826
S° Bound: 29.741552

Extent Group 1 / Time Frame 1

CC ID: 1139302
Time Frame Type: Discrete
Start: 2006-09-22

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer;

Data Access Constraints:

None

Data Use Constraints:

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. 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.

Distribution Information

Distribution 1

CC ID: 743037
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=578
Distributor:
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 743038
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/578/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 743040
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 743041
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 690555
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 690554
Activity Date/Time: 2017-11-14
Description:

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.

Activity Log 3

CC ID: 718706
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743039
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcMap 9.2.2.1350

Data Quality

Accuracy:

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.

Horizontal Positional Accuracy:

Raw elevation measurements have been determined to be within 1 meter horizontal accuracy.

Vertical Positional Accuracy:

Elevations of the DEM are vertically consistent with the point elevation data, +/-15 cm.

Completeness Report:

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.

Conceptual Consistency:

Each file contains data located in a 2-kilometer by 2-kilometer tile, where the upper-left bound can be assessed quickly through the filename.

The first 3 numbers in the filename 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 (ex. fs_e123_n4567_16).

Lineage

Sources

EAARL Topography--Jean Lafitte National Historical Park and Preserve 2006

CC ID: 1139297
Publish Date: 2008-01-01
Extent Type: Discrete
Extent Start Date/Time: 2006-09-22
Source Contribution:

none | Source Geospatial Form: LAS | Type of Source Media: Point elevation measurements collected by the EAARL sensor.

Process Steps

Process Step 1

CC ID: 1139298
Description:

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).

Process Date/Time: 2006-09-22 00:00:00

Process Step 2

CC ID: 1139299
Description:

Metadata imported into ArcCatalog from XML file.

Process Date/Time: 2008-07-15 00:00:00

Process Step 3

CC ID: 1139300
Description:

The NOAA Office for Coastal Management received the data in LAS format. The files contained Lidar elevation and intensity measurements. The data were

projected in UTM coordinates (NAD83; Zone 15N) and referenced to the North American Vertical Datum of 1988 (NAVD88) using the Geoid03 model. The

following processes were performed to make the data available within the Digital Coast:

1. The data were converted from UTM (NAD83; Zone 15N) to geographic coordinates (NAD83).

2. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoidal) heights using the Geoid03 model.

3. The data were reclassified to reflect a bare earth surface (class 0 to class 2).

4. The LAS data were sorted by latitude and the headers were updated.

Process Date/Time: 2011-04-28 00:00:00

Catalog Details

Catalog Item ID: 50102
GUID: gov.noaa.nmfs.inport:50102
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:24+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16