gov.noaa.csc.maps:2007_USACE_Guam_m551 Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) 20071211 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 These data were collected for the Government of Guam Department of Public Works and the Government of Guam Office of Homeland Security from February 18 through May 20, 2007. The data contained in these files contain topographic data collected by the CHARTS system. The data points representing bare earth have been classified as such using TerraScan. The topographic lidar was collected across the island of Guam to produce 2 foot contours and bathymetric lidar was collected to fill the areas where no data were obtained during previous survey efforts. The bathymetric lidar data were collected from the land/water interface seaward to a depth of 40 meters or laser extinction, whichever came first. This is a classified data set. Classification values are: Class 1: Unclassified Class 2: Ground Class 11: Water The data contain both first and last return lidar data. The topographic lidar data are vertically referenced to Mean Sea Level (MSL) and the bathymetric lidar data are referenced to Mean Lower Low Water (MLLW). The purpose of this survey was to collect topographic lidar across the island of Guam to produce 2-foot contours and to collect bathymetric lidar data to fill the areas where no data were obtained during previous survey efforts. The bathymetric lidar data were to be collected from the land water interface seaward to a depth of 40 meters or laser extinction, whichever comes first. A footprint of this data set may be viewed in Google Earth at: ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/gu/2007_JALBTCX_Topobathy_Guam_Lidar.kmz 20070218 20070520 ground condition Complete As needed 144.616616 144.962572 13.654497 13.229483 ISO 19115 Topic Category elevation None Bathymetry/Topography Lidar Elevation None United States Territory Guam None February 2007 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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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. Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) would be appreciated in any publications or derived products. These data are not attributed. N/A These data are not attributed. The data provided in this file were tested against ground truth data. At these locations the lidar data matched within 0.20 meters, and different flight line data agreed within 0.20 meters. These data covered the required survey area with minimal gaps in data coverage except near tops of mountains. These gaps are caused when the ground elevation rises so high that the lidar swath (based on maximum scan angles and altitude) from adjacent flight lines no longer overlap. The data postings are very consistent with postings nominally at 1.3 m density. The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 0.75 m. 0.75 1 Sigma The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.20 m. 0.20 1 Sigma JALBTCX (comp.) Unpublished material Unknown 1 globe These data were collected by JALBTCX as project number 07006. hard drive 20070218 20070520 publication date Not provided Not provided These data were collected using the CHARTS system. It is owned by the Naval Oceanographic Office and Operated through contract. The system collects topographic lidar data at 20 kHz and hydrographic data at 3 kHz. The system also collects RGB imagery at 1Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V equipment. Raw data are collected and transferred to the office for downloading and processing in SHOALS GCS software. GPS data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. These data are edited using Fledermaus software where anomalous data are removed from the dataset. The edited data are written to the national grid system 1 km tiles using chartsLAS, a program written by NAVO. This program reads data from the original binary format files and produces separate ASCII files for first and last return data. Using a model calculated by NAVO, data were converted from ellipsoid to Mean Sea Level heights using the program datum_shift, written by NAVO. The LAS files output from chartsLAS were read into TerraScan and filters were applied to classify ground points. Points designated as ground are assigned a classification value "2" and all other points are assigned the classification value "1" which represents an unclassified state. 20071114 JALBTCX Data Production Manager mailing and physical

7225 Stennis Airport Road, STE 100

Kiln MS 39556 USA 228-252-1111 228-252-1121 228-252-1133 shoals-info@sam.usace.army.mil 8 am to 5 pm Monday through Friday The NOAA Coastal Services Center (CSC) received files in LAS format. The files contained LiDAR intensity and elevation measurements. CSC performed the following processing on the data for storage and provisioning purposes within Digital Coast: 1. The data were converted from UTM coordinates to geographic coordinates. 2. The bathymetric lidar classifications were set to class 11. 3. The LAS georeference header files were set to reflect the tidal vertical datums. 4. The LAS header fields were sorted by latitude and updated. 201011 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. 20110620 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 0.0000001 0.0000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Mean Sea Level 0.001 meters Explicit elevation coordinate included with horizontal coordinates MLLW 0.001 meters Explicit depth coordinate included with horizontal coordinates 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 JALBTCX, 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 http://www.ncddc.noaa.gov/ Content Specification for Metadata in the National Coastal Data Development Center's Data Catalog Version 2.0