gov.noaa.csc.maps:2004_AK_m23 Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) 20060322 1st Edition Charleston, SC NOAA's Ocean Service, Coastal Services Center (CSC) http://csc-s-maps-q.csc.noaa.gov/dataviewer/viewer.html The data sets are generated using the OPTECH ALTM 70 kHz LIDAR system mounted onboard AeroMap's twin-engine Cessna 320 aircraft. Classified data sets such as this one may have varying posting due to some LIDAR pulses not reaching the ground caused by data anomalies. Accuracy statements are based on areas of moderate terrain. Diminished accuracies are to be expected in areas of extreme terrain and dense vegetation. The accuracy of each point is expected to meet the vertical accuracy standard, however, derived products may be less accurate in extreme terrain and dense vegetation due to a lesser number of points defining the bare-earth in these areas. The data were QA/QC'ed but some data holidays still exist. The purpose of this data set is to provide a source for current and accurate digital elevation models (DEM) with vertical accuracy's of 30cm root mean square error (RMSE) or better.These data were acquired at flying heights of 1200 and 2000 meters Above Mean Terrain (AMT) with post spacing planned for 1 and 2 meters. This data is not recommended for design mapping or engineering. A DEM is used as a fundamental layer of information in Geographic Information Systems (GIS). A number of the priority layers of spatial information recognized by the National Spatial Data Infrastructure may be derived from LIDAR DEMs, including elevation, hydrography, slope, aspect, and shoreline delineation. 20040721 20040722 20040801 20040805 20040806 20040811 ground condition Complete unknown -168.530215 -162.633189 68.359970 65.594656 ISO 19115 Topic Category Elevation None Elevation Cartography Geodesy Geography Hydrography Mapping Photogrammetry Stereophotogrammetry Bathymetry/Topography Radar Interferometric Remote Sensing LIDAR Laser DEM DTM DSM Terrain Height None USA Alaska Seward Peninsula Wales Shishmaref Cape Espenburg Kotzebue Cape Krusenstern Kivilina Cape Seppings Cape Thompson Point Hope None Terrain Earth Surface Bald Ground First None July August 2004 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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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 it's limitations. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) TCM Project Scientist mailing and physical address

2234 South Hobson Avenue

Charleston South Carolina 29405 United States (843) 740-1200 tcm@csc.noaa.gov This data set was developed for the NOAA CSC by AeroMap US. Unknown Complete All data products were processed to meet 0.6 & 1.0 meters RMSE or better in horizontal accuracy. All data products were processed to meet 30cm RMSE or better in vertical accuracy. We recommend a ground quality control check of the data set. This data is not recommended for design grade mapping or engineering. The raw points for the point cloud data product were captured using AeroMap U.S.'s twin-engine Cessna equipped with our OPTECH ALTM 70 kHz LIDAR data acquisition system. The system includes differential GPS and inertial measurement systems to provide superior accuracy. The flying height is 1200 & 2000 meters Above Mean Terrain (AMT).These data were post-processed utilizing Optech's REALM (Version 3.5.4) software, which applies AeroMap U.S.'s Applanix Inertial Measurement Unit (IMU) values to the acquired Airborne Global Positioning Systems (ABGPS) data. These results are then applied to the acquired LIDAR data points and output to a LIDAR accuracy standard (LAS) format in a WGS 84, Universal Transverse Mercator (UTM), Zone 3, Meters coordinate system.Using Bentley's Microstation V8 LIDAR these data were imported in LAS format. Using TerraSolid's TerraScan (version 6.04) software, these data were imported into a TerraScan project files (PRJ) and converted (on import) to a binary files, no data were classified, all original "point cloud" data as output from REALM. Theses data were then output to the deliverable ASCII, space delimited, CTIXYZ format, (see attribute section for explanation of ASCII file syntax). 20060324 Robert T. Thomason Jr. AeroMap U.S. LIDAR Production Manager mailing and physical address

2014 Merrill Field Drive

Anchorage Alaska 99501-4116 USA 907-272-4495 907-274-3265 thomason@aeromap.com 8:00 am to 5:00 pm Alaska Time Created initial metadata 20060324 Robert T. Thomason Jr. AeroMap U.S. LIDAR Production Manager mailing and physical address

2014 Merrill Field Drive

Anchorage Alaska 99501-4116 USA 907-272-4495 907-274-3265 thomason@aeromap.com 8:00 am to 5:00 pm Alaska Time 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 to make it available within the Lidar Data Retrieval Tool (LDART):1. All data points in the ASCII files were projected geographic decimals degrees using the USGS General Cartographic Transformation Package (GCTP) software.2. All ASCII files containing points collected on the same date were combined into a single file and sorted by latitude.3. The sorted files were then converted to binary LAS files and the las header fields were updated.4. Data was QA/QC'ed and many points removed - there still remains several 'data holidays' as unique outliers in otherwise ordered areas. They can be manually edited by user if required 20070209 Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) TCM Project Scientist mailing and physical address

2234 South Hobson Avenue

Charleston South Carolina 29405 United States (843) 740-1200 tcm@csc.noaa.gov The NOAA National Geophysical Data Center (NGDC) received Lidar data files on external harddrive. The disk contains 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 on this disk 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. 20071226 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 Point Entity point 1605257945 Universal Transverse Mercator 3 0.999600 -165.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000512 0.000512 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Ellipsoidal Heights .01 meters Attribute values *.xyz ASCII text data fields Software Generated C LIDAR "Class" of data point Software generated T LIDAR GPS Timestamp number Software generated I LIDAR "Intensity" value of data point Software Generated X Horizontal easting location of data point Software Generated Y Horizontal northing of data point Software Generated Z Vertical elevation of data point Software Generated Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) Keil Schmid TCM Project Scientist mailing and physical address

2234 South Hobson Avenue

Charleston SC 29405-2413 843-740-1200 tcm@csc.noaa.gov Downloadable data Any conclusions drawn from analysis of this informationare not the responsibility of NOAA, the Coastal Services Center or it's partners. This data can be obtained on-line at the following URL:http://csc-s-maps-q.csc.noaa.gov/dataviewer/viewer.html. The data set is dynamically generated based onuser-specified parameters. 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 Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) Keil Schmid TCM Project Scientist mailing and physical address

2234 South Hobson Avenue

Charleston SC 29405-2413 843-740-1200 tcm@csc.noaa.gov FGDC Content Standards for DigitalGeospatial Metadata FGDC-STD-001-1998