gov.noaa.ngdc.mgg.dem:300 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce User Services Mailing and Physical Address

NOAA/NESDIS/NGDC E/GC 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6826 (303) 497-6513 ngdc.info@noaa.gov 7:30 - 5:00 Mountain 20060523 First raster digital data NOAA Tsunami Inundation DEMs Myrtle Beach, South Carolina 1/3 arc-second Boulder, Colorado DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce User Services Mailing and Physical Address

NOAA/NESDIS/NGDC E/GC 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6826 (303) 497-6513 ngdc.info@noaa.gov 7:30 - 5:00 Mountain http://www.ngdc.noaa.gov/dem/squareCellGrid/download/300 http://www.ngdc.noaa.gov/dem/squareCellGrid/download/300 Myrtle Beach, SC 1/3 arc-second Tsunami Innundation DEM Download page for accessing DEM, metadata record and development report. download http://www.ngdc.noaa.gov/mgg/inundation/tsunami/inundation.html NOAA Tsunami Inundation Gridding Project Project web page. information DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/OAR/PMEL/NCTR > NOAA Center for Tsunami Research, Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce 20081031 Raster Digital Data NOAA Tsunami Inundation DEMs Named by primary coastal city, state in DEM. Boulder, Colorado DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce http://www.ngdc.noaa.gov/mgg/inundation/tsunami/inundation.html http://www.ngdc.noaa.gov/mgg/inundation/tsunami/inundation.html NOAA Tsunami Inundation Gridding Project Project web page. information http://www.ngdc.noaa.gov/dem/squareCellGrid/map Map Interface Graphic geo-spatial search tool for locating completed and planned NOAA tsunami inundation DEMs. search http://www.ngdc.noaa.gov/dem/squareCellGrid/search DEM text search tool Text search tool for locating completed and planned NOAA tsunami inundation DEMs. search NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) for select U.S. coastal regions. These integrated bathymetric-topographic DEMs are used to support tsunami forecasting and modeling efforts at the NOAA Center for Tsunami Research, Pacific Marine Environmental Laboratory (PMEL). The DEMs are part of the tsunami forecast system SIFT (Short-term Inundation Forecasting for Tsunamis) currently being developed by PMEL for the NOAA Tsunami Warning Centers, and are used in the MOST (Method of Splitting Tsunami) model developed by PMEL to simulate tsunami generation, propagation, and inundation. Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. National Ocean Service (NOS), the U.S. Geological Survey (USGS), the U.S. Army Corps of Engineers (USACE), the Federal Emergency Management Agency (FEMA), and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to the vertical tidal datum of Mean High Water (MHW) and horizontal datum of World Geodetic System 1984 (WGS84). Grid spacings for the DEMs range from 1/3 arc-second (~10 meters) to 3 arc-seconds (~90 meters). Developed for the Pacific Marine Environmental Laboratory (PMEL), NOAA Center for Tsunami Research program in support of NOAA's tsunami forecasting and warning efforts. Lisa A. Taylor Barry W. Eakins Robin R. Warnken Kelly S. Carignan George F. Sharman David C. Schoolcraft Peter W. Sloss DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Lisa A. Taylor Mailing and Physical Address

NOAA/NESDIS/NGDC 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6767 (303) 497-6958 (303) 497-6513 Lisa.A.Taylor@noaa.gov 7:30 - 5:00 Mountain Contact Data Center 200801 NOAA Technical Memorandum NESDIS NGDC-1 Boulder, CO DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce User Services Mailing and Physical Address

NOAA/NESDIS/NGDC E/GC 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6826 (303) 497-6513 ngdc.info@noaa.gov 7:30 - 5:00 Mountain 19 pages http://www.ngdc.noaa.gov/dem/squareCellGrid/getReport/300 http://www.ngdc.noaa.gov/dem/squareCellGrid/getReport/300 Digital Elevation Models of Myrtle Beach, South Carolina: Procedures, Data Sources and Analysis Report describing the development of the Myrtle Beach, South Carolina DEMs download 1955 2005 ground condition Complete As needed -79.20 -78.40 33.95 33.25 NASA/GCMD Earth Science Keywords Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth Earth Science > Land Surface > Topography > Terrain Elevation Earth Science > Land Surface > Topography > Topographical Relief Earth Science > Oceans > Coastal Processes > Coastal Elevation NASA/GCMD Platform Keywords DEM > Digital Elevation Model NASA/GCMD Data Center Keywords DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce WDC/MGG, BOULDER > World Data Center for Marine Geology and Geophysics, Boulder NASA/GCMD Data Resolution Keywords H: 1 meter - < 30 meters V: < 1 meter ISO 19115 Topic Category elevation Uncontrolled Coastal Relief Gridded elevations Integrated bathymetry and topography NASA/GCMD Location Keywords Continent > North America > United States of America > South Carolina Ocean > Atlantic Ocean > North Atlantic Ocean Vertical Location > Land Surface Vertical Location > Sea Floor Uncontrolled Myrtle Beach Grand Strand Long Bay Tsunami Inundation Gridding Project Digital Elevation Model DEM Light Detection and Ranging LIDAR Tsunami Inundation Gridding Project Digital Elevation Model DEM Interferometric Swath Bathymetry System IFSBS Tsunami Inundation Gridding Project Digital Elevation Model DEM Sound Navigation and Ranging SONAR None. Not to be used for navigational purposes. DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Barry W. Eakins Research Scientist mailing and physical address

NOAA/NESDIS/NGDC

325 Broadway, E/GC3

Boulder Colorado 80305-3328 USA 303-497-6505 303-497-6513 Barry.Eakins@noaa.gov 9am-5pm, M-F, Mountain Time Contact NGDC's Marine Geology and Geophysics Division. http://www.ngdc.noaa.gov/mgg/aboutmgg/contacts.html http://www.ngdc.noaa.gov/dem/squareCellGrid/getGraphic/300 Perspective view of DEM JPEG Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.4.1420 gov.noaa.ngdc.mgg.dem:tigp Datasets were visually compared internally and externally (with other overlapping datasets and satellite images and maps) in ESRI ArcGIS for identification of anomalous elevations or data inconsistencies. Where elevation inconsistencies occurred, the most recent and/or highest resolution data set was selected for use in that region. Elevations in the older and/or lower-resolution datasets were deleted prior to building the DEM. NGDC made every effort to obtain all available digital topographic and bathymetric datasets in the region for use in building the DEM. The horizontal accuracy of bathymetric and topographic features in the DEM is dependent upon the accuracy of the input datasets used to determine corresponding cell values. Topography: 10 to 20 meters. Positional accuracy of input topographic datasets limits accuracy of corresponding cells in DEM. LiDAR postings accurate to within ~2 meters; shoreline-crossing beach profiles accurate to ~ 1 meter; NED data to within ~15 meters. Where present, LiDAR and beach profile data supplant NED data values in the DEM. DEM cell-value relative-contribution factors: LiDAR: 50, beach profiles: 50 to 100, NED: 10. Bathymetry: 10 to several tens of meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM: USGS interferometric sonar surveys and beach profiles: about 1 meter. Early 20th-century NOS hydrographic soundings are limited by sparseness of deep-water soundings, and potentially large position accuracy of pre-satellite (i.e., GPS) navigation: tens to several tens of meters. Morphologic change in inland rivers and along the coast also degrades the positional accuracy of NOS soundings. Where present, USGS interferometric sonar survey grid and beach profiles supplant NOS hydrographic sounding data values in the DEM. DEM cell-value relative-contribution factors: USGS interferometric sonar survey grid: 100, beach profiles: 50 to 100, NOS hydrographic soundings: 1. The vertical accuracy of bathymetric and topographic features in the DEM is dependent upon the accuracy of the input datasets used to determine corresponding cell values. Topography: 0.15 to 7 meters. Vertical accuracy of input topographic datasets limits accuracy of corresponding cells in DEM. USGS NED DEM: up to 7 meters. Coastal LiDAR surveys: 0.15 to 0.3 meters; shoreline-crossing beach profiles ~0.1 meters. Where present, LiDAR data supersede NED data values in the DEM. DEM cell relative-contribution factors: LiDAR: 50, beach profiles: 50 to 100, NED: 10. Bathymetry: 0.1 meters to 5% of water depth. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. GPS-navigated USGS interferometric swath sonar surveys: about 0.1 meters. Early 20th-century NOS hydrographic soundings are limited by sparseness of deep-water soundings, and potentially large position accuracy of pre-satellite (i.e., GPS) navigation: several tens of meters. Where present, USGS interferometric sonar survey grid and beach profiles supersede NOS hydrographic sounding data values in DEM. DEM cell relative-contribution factors: USGS interferometric sonar grid: 5, beach profiles: 50 to 100, NOS hydrographic soundings: 1. Gridding interpolation to determine cell values between sparse NOS hydrographic soundings in deep water degrades the vertical accuracy of deep-water elevations. DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce User Services Mailing and Physical Address

NOAA/NESDIS/NGDC E/GC 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6826 (303) 497-6513 ngdc.info@noaa.gov 7:30 - 5:00 Mountain 2008 http://www.ngdc.noaa.gov/mgg/bathymetry/hydro.html http://www.ngdc.noaa.gov/mgg/bathymetry/hydro.html NOS Hydrographic Survey Database Digital database of NOS hydrographic surveys that date back to the late 19th century. download online 1925 1972 ground condition NOS Hydrographic Surveys downloaded from web site. U.S. Army Corps of Engineers, Charleston District 2006 CD-ROM 2005 2006 ground condition USACE Bathymetric Surveys provided by USACE, Charleston District DOI/USGS > U.S. Geological Survey, Department of the Interior DOI/USGS > U.S. Geological Survey, U.S. Department of the Interior Mailing and Physical

12201 Sunrise Valley Drive

Reston VA 20192 USA (703) 648-4000 2006 http://pubs.usgs.gov/of/2004/1013/index.html http://pubs.usgs.gov/of/2004/1013/index.html Maps Showing the Stratigraphic Framework of South Carolina's Long Bay from Little River to Winyah Bay Research and bathymetric data download online 1999 2003 publication date USGS interferometric swath sonar grid downloaded from web site. Horry County, South Carolina 2005 digital tape media 2005 ground condition Horry County, South Carolina LiDAR provided by Horry County, South Carolina Coastal Carolina University 2006 digital tape media 2006 ground condition Coastal Carolina University beach profiles provided by Coastal Carolina University Coastal Science and Engineering, Inc. 2006 digital tape media 2006 ground condition Coastal Science and Engineering, Inc. beach profiles provided by Coastal Science and Engineering, Inc. DOI/USGS > U.S. Geological Survey, Department of the Interior DOI/USGS > U.S. Geological Survey, U.S. Department of the Interior Mailing and Physical

12201 Sunrise Valley Drive

Reston VA 20192 USA (703) 648-4000 2008 http://ned.usgs.gov/ http://ned.usgs.gov/ USGS National Elevation Dataset Digital database of U.S. topography, in raster form (DEM) download online 2006 publication date USGS NED topography downloaded from web site. All datasets obtained by NGDC were converted to common horizontal and vertical datums of WGS84 geographic and Mean High Water, respectively, using FME. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection. 20060401 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Barry W. Eakins Research Scientist mailing and physical address

NOAA/NESDIS/NGDC

325 Broadway, E/GC3

Boulder Colorado 80305-3328 USA 303-497-6505 303-497-6513 Barry.Eakins@noaa.gov 9am-5pm, M-F, Mountain Time Contact NGDC's Marine Geology and Geophysics Division. http://www.ngdc.noaa.gov/mgg/aboutmgg/contacts.html Datasets were visually inspected with ArcGIS for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency. 20060420 The shoreline-crossing beach profile data (~1 meter spacing along profiles but between 80 and 780 meters between profiles) were converted to xyz format, then gridded to 1/3 arc-second spacing (~10 meters) using MB-System's 'mbgrid' tool. The resulting Arc ASCII grid was imported into ArcGIS and clipped to a polygon tightly enclosing the beach profile data to prevent interpolation outside data coverage. 20060510 xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 1 arc-second grid that interpolated to fill empty cells. Points extracted every 10 meters along the coastline were also included to ensure that the bathymetric grid reached zero at the coast. The resulting Arc ASCII grid was imported into ArcGIS and clipped to the coastline to remove values over land. 20060515 xyz files for each input dataset were gridded using MB-System's 'mbgrid' tool, which utilizes a high-tension spline interpolation method to fill grid cells with no input elevation values. Preferential weighting was given to more recent, higher-accuracy datasets. Gridding was performed in quadrants, each with a 5% data buffer. The grids were imported in ArcGIS and seamlessly merged to create the final DEM. 20060517 The DEM was quantitatively evaluated by comparing with source datasets and with elevation values extracted from USGS topographic bench marks. It was visually evaluated by converting to UTM-zone coordinates (units of meters horizontally and vertically) and then creating a slope grid to identify gridding artifacts in the DEM. 20060521 Raster ASCII text Grid Cell 7561 8641 1 0.00009259259 0.00009259259 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 Mean High Water 0.01 meters Explicit elevation coordinate included with horizontal coordinates Mean High Water 0.01 meters Explicit depth coordinate included with horizontal coordinates DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Barry W. Eakins Research Scientist mailing and physical address

NOAA/NESDIS/NGDC

325 Broadway, E/GC3

Boulder Colorado 80305-3328 USA 303-497-6505 303-497-6513 Barry.Eakins@noaa.gov 9am-5pm, M-F, Mountain Time Contact NGDC's Marine Geology and Geophysics Division. http://www.ngdc.noaa.gov/mgg/aboutmgg/contacts.html Downloadable Data 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. ESRI Arc ASCII 1 ASCII text version of ESRI ArcGIS raster format WINZIP 213000000 http://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/300 http://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/300 Myrtle Beach, SC 1/3 arc-second Tsunami Inundation DEM DEM, metadata and Readme file for the Myrtle Beach, South Carolina DEM. download http://www.ngdc.noaa.gov/dem/squareCellGrid/download/300 Myrtle Beach, SC 1/3 arc-second Tsunami Inundation DEM Download page for accessing DEM, metadata record and development report. information None 20110826 20120226 20120826 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Barry W. Eakins Research Scientist mailing and physical address

NOAA/NESDIS/NGDC

325 Broadway, E/GC3

Boulder Colorado 80305-3328 USA 303-497-6505 303-497-6513 Barry.Eakins@noaa.gov 9am-5pm, M-F, Mountain Time Contact NGDC's Marine Geology and Geophysics Division. http://www.ngdc.noaa.gov/mgg/aboutmgg/contacts.html Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata FGDC-STD-012-2002 local time