gov.noaa.csc.maps:2006_USGS_Jean_Lafitte_m578 Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) U.S. Geological Survey 2008 LAS Charleston, SC NOAA's Ocean Service, Coastal Services Center (CSC http://csc-s-maps-q.csc.noaa.gov/dataviewer/viewer.html?missions=578&aoi=-90.2420451001485,-90.0985591004479,29.7415522996421,29.8738260001437 http://www.csc.noaa.gov/lidar http://www.csc.noaa.gov 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. 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. A footprint of the data may be viewed in Google Earth at: ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/la/2006_USGS_NPS_NASA_EAARL_Lidar_Jean_Lafitte_Louisiana.kmz 20060922 ground condition Complete None planned -90.242045 -90.098559 29.873826 29.741552 ISO 19115 Topic Category elevation None Bathymetry/Topography Airborne Lidar Processing System ALPS EAARL Digital Surface Model DSM EAARL Experimental Advanced Airborne Research Lidar laser altimetry LIDAR remote sensing topography None US Louisiana Jefferson Parish Jean Lafitte National Historical Park and Preserve 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. 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 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. 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 2009 30(4); pp. 861-878 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 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. 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). 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 LAS 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). 20060922 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) The NOAA Coastal Services Center 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. 20110428 NOAA Coastal Services Center Clearinghouse Manager mailing and physical

2234 South Hobson Ave.

Charleston SC 29405-2413 843-740-1210 clearinghouse@noaa.gov Point 0.0000001 0.0000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222101 Ellipsoid 0.001 meters Explicit elevation coordinate included with horizontal coordinates LAS v 1.2 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. NOAA Coastal Services Center Clearinghouse Manager mailing and physical

2234 South Hobson Ave.

Charleston SC 29405-2413 843-740-1210 clearinghouse@noaa.gov Downloadable Data Any conclusions drawn from the analysis of this information are not the responsibility of the Coastal Services Center or its partners. This data can be obtained on-line at the following URL: http://www.csc.noaa.gov/lidar 20111119 20111119 20121119 NOAA Coastal Services Center Clearinghouse Manager mailing and physical

2234 South Hobson Avenue

Charleston SC 29405-2413 843-740-1210 clearinghouse@noaa.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998