gov.noaa.csc.maps:2003_USGS_VI_m566 Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) U.S. Geological Survey (USGS) 2011 Charleston, SC NOAA's Ocean Service, Coastal Services Center (CSC) http://csc-s-maps-q.csc.noaa.gov/dataviewer/viewer.html?keyword=lidar http://www.csc.noaa.gov/lidar http://www.csc.noaa.gov This data set contains topographic and bathymetric lidar data that were collected on April 21, 23, 30, May 2, and June 14, 17 of 2003, cooperatively by the U.S. Geological Survey (USGS), National Aeronautics and Space Administration (NASA), and National Park Service (NPS). The data is for part of the U.S. Virgin Islands (island of St. John and a portion of the northern coastline of St. Croix). The bathymetric lidar data are classified as 11 and the topographic lidar data are classified as 0. A first surface and submerged topography elevation map (also known as a Digital Elevation Model, or DEM) of a portion of the U.S. Virgin Islands (island of St. John and a portion of the northern coastline of St. Croix) was produced from remotely sensed, geographically referenced elevation measurements cooperatively by the U.S. Geological Survey (USGS), National Aeronautics and Space Administration (NASA), and National Park Service (NPS). 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 surveyed easily 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 and submerged topography elevation map of a portion of the U.S. Virgin Islands. 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 converts raw Lidar data into a GIS-compatible map product to be provided to National Park Service 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. 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. A footprint of this data set may be viewed in Google Earth at: ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/vi/2003_USGS_USVI_TopoBathy_Lidar.kmz 20030421 20030423 20030430 20030502 20030614 20030617 ground condition Complete None planned -64.819269 -64.607852 18.373668 17.746823 ISO 19115 Topic Category elevation None Bathymetry/Topography Airborne Lidar Processing System ALPS DEM Digital Elevation Model EAARL Experimental Advanced Airborne Research Lidar laser altimetry Lidar remote sensing submerged topography Topography Bathymetry None U.S. Virgin Islands St. John St. Croix Buck Island None 2003 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. Amar Nayegandhi Jacobs Technology, U.S. Geological Survey, FISC, St. Petersburg, FL Computer Scientist mailing and physical

600 4th Street South

Saint Petersburg Florida 33701 USA 727-803-8747 (x3026) 727-803-2031 anayegandhi@usgs.gov M-F, 8:00-5:00 EST 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. 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 photo interpretation, 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 ArcCatalog 9.2.2.1350 The expected accuracy of the measured variables is as follows: attitude within 0.07 degree, 3 cm nominal ranging accuracy, and vertical elevation accuracy of +/-15 cm for the topographic surface. Quality checks are built into the data-processing software. When the data was received by the NOAA Coastal Services Center, each file contained data located in a 2-km by 2-km tile, where the upper-left bound can be quickly assessed through the file name. The first 3 numbers in the file name represented the left-most UTM easting coordinate (e###000) in meters, the next 4 numbers represented the top-most UTM northing coordinate (n####000) in meters, and the last 2 numbers (##) represented the UTM zone in which the tile is located (for example, fs_e123_n4567_20). Not Provided 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. Geological Survey 2008 first remote-sensing image U.S. Geological Survey Data Series 406 Saint Petersburg, FL U.S. Geological Survey Point elevation measurements collected by the EAARL sensor. 20030421 20030423 20030430 20030502 20030614 20030617 None None None U.S. Geological Survey 2008 Unknown first remote-sensing image U.S. Geological Survey Data Series 395 Saint Petersburg, FL U.S. Geological Survey Point elevation measurements collected by the EAARL sensor. 20030421 20030423 20030430 20030502 20030614 20030617 None 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 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 Airborne 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). 2008 Amar Nayegandhi Jacobs Technology, U.S. Geological Survey, FISC, St. Petersburg, FL Computer Scientist mailing and physical

600 4th Street South

Saint Petersburg Florida 33701 USA 727-803-8747 (x3026) 727-803-2031 anayegandhi@usgs.gov M-F, 8:00-5:00 EST Metadata imported into ArcCatalog from XML file. 20080729 Xan Yates Jacobs Technology, U.S. Geological Survey, FISC, St. Petersburg, FL Metadata Specialist mailing and physical address

600 4th Street South

Saint Petersburg Florida 33701 USA 727-803-8747 (x3086) M-F, 8:00-5:00 EST The NOAA Coastal Services Center (CSC) received the data in las format. The files contained LiDAR intensity and elevation measurements. CSC performed the following processing for data storage purposes and Digital Coast provisioning: 1. The data were converted from UTM (Zone 20) WGS84 coordinates to geographic NAD83 coordinates. 2. The bathy data were reclassified from 0 to 11 and the topo data were left at classification 0. 3. The data were converted from ITRF00 ellipsoid heights to GRS80 ellipsoid heights using Geoid03. 4. The data were sorted by latitude and the LAS header files were updated. 201102 NOAA Coastal Services Center Clearinghouse Manager mailing and physical

2234 South Hobson Ave.

Charleston SC 29405 US 843-740-1210 clearinghouse@noaa.gov The NOAA National Geophysical Data Center (NGDC) received Lidar data files by ftp. The data received compressed containing LiDAR data from the NOAA Coastal Services Center. The data are currently being served via Digital Coastl at http://www.csc.noaa.gov/digitalcoast/. The data can be used to re-populate the system. The data are provided in LAS format. LAS format is an industry standard for serving LiDAR data. The data are exclusively in geographic coordinates, however, the datums used vary. Most are NAD 83, however some are in ITRF. Vertical systems include both ellipsoid (ITRF and NAD 83) and NAVD 88. For NAVD 88 values, Geiod 03 is primarily used; however, data received in NAVD 88 prior to 2003 was processed using Geoid 99. 20110427 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Pamela Grothe Mailing and Physical Address

NOAA/NESDIS/NGDC E/GC1 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6120 (303) 497-6958 (303) 497-6513 pamela.grothe@noaa.gov 7:30-5:00 Mountain Contact Data Center Point 0.0000001 0.0000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Ellipsoid 0.001 meters Explicit elevation coordinate included with horizontal coordinates Each pixel of the encoded GeoTIFF has an explicit elevation value associated with it. The GeoTIFF grid is encoded with a 1-meter resolution. 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 USGS, the Coastal Services Center or its partners. This data can be obtained on-line at the following URL: http://www.csc.noaa.gov/lidar DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Pamela Grothe Mailing and Physical Address

NOAA/NESDIS/NGDC E/GC1 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6120 (303) 497-6958 (303) 497-6513 pamela.grothe@noaa.gov 7:30-5:00 Mountain Contact Data Center Disclaimer While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. The National Geophysical Data Center serves as the archive for this LIDAR data. NGDC should only be contacted for this data if it cannot be obtained from NOAA Coastal Services Center. 20111119 20111119 20121119 NOAA Coastal Services Center Clearinghouse Manager mailing and physical Charleston SC 29405-2413 843-740-1210 clearinghouse@noaa.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998