gov.noaa.ngdc.mgg.dem:707 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 20101201 First raster digital data NOAA Tsunami Inundation DEM Kachemak Bay, Alaska MHW 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/707 http://www.ngdc.noaa.gov/dem/squareCellGrid/download/707 Kachemak Bay, AK 1/3 arc-second MHW Tsunami Inundation 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 warning 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 a variety of vertical datums and horizontal datum of World Geodetic System of 1984 (WGS84). Cell size for the DEMs ranges 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. Dorothy Z. Friday Lisa A. Taylor Barry W. Eakins Robert J. Caldwell Kelly S. Carignan Elliot Lim Pamela R. Grothe 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 20101207 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 23 pages http://www.ngdc.noaa.gov/dem/squareCellGrid/getReport/707 http://www.ngdc.noaa.gov/dem/squareCellGrid/getReport/707 Digital Elevation Model of Kachemak Bay, Alaska: Procedures, Data Sources and Analysis Report describing the development of the Kachemak Bay, Alaska DEM download 1915 2010 ground condition Complete As needed -152.10 -150.89 59.82 59.32 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 > Alaska Ocean > Pacific Ocean > Pacific Ocean Vertical Location > Land Surface Vertical Location > Sea Floor Uncontrolled Kachemak Bay Seldovia Anchor Point Homer Tsunami Inundation Gridding Project Digital Elevation Model DEM Light Detection and Ranging LIDAR Tsunami Inundation Gridding Project Digital Elevation Model DEM Multibeam Swath Bathymetry System MSBS 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/707 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 and Applied Imagery's Quick Terrain Modeler 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 DEM cell size and the accuracy of the input datasets used to determine corresponding cell values. Topography: 10-30 meters due to SRTM dataset cell size. Lidar: 10 meters, due to cell size of DEM, SRTM: 30 meters. DEM cell-value relative-contribution factors: Lidar: 10, SRTM Data: 0.1. Bathymetry: 10 meters, based on DEM cell size, to several tens of meters. Positional accuracy of input bathymetric datasets limits accuracy of corresponding cell values in DEM: Recent NOS data: about 5 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: tens to several tens of meters. USACE surveys: 10 meters. Morphologic change in the depositional environment along the coast can also degrade the positional accuracy of DEM features. DEM cell-value relative-contribution factors: USACE hydrographic survey data: 0.1, Older NOS data: 0.1, Recent NOS data: 10 The vertical accuracy of bathymetric and topographic features in the DEM is dependent upon DEM cell size and the accuracy of input datasets used to determine corresponding cell values. Topography: from less than 1 to 20 meters. Vertical accuracies of input topographic datasets, including the non-bare earth nature of SRTM data, limit the accuracy of corresponding cells in DEM. Lidar: less than 1 meter, SRTM: 5-20 meters. DEM cell relative-contribution factors: Lidar: 10, SRTM: 0.1. Bathymetry: 0.1 meters to 5% of water depth. Vertical accuracy of input bathymetric datasets limits accuracy of corresponding cells in DEM. GPS-navigated recent NOS hydrographic soundings and USACE hydrographic soundings: less than 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: several meters. Morphologic change in the depositional environment along the coast can also degrade the positional accuracy of DEM features. Where present, recent high resolution NOS datasets replace early hydrographic sounding data values in DEM. DEM cell relative-contribution factors: USACE hydrographic survey data: 0.1, Recent NOS Hydrographic survey data: 10, Early NOS Hydrographic Surveys: 0.1. Gridding interpolation to determine cell values between sparse NOS hydrographic soundings in deep water degrades the vertical accuracy of deep-water elevations. DOC/NOAA/NOS National Ocean Service, NOAA, U.S. Department of Commerce DOC/NOAA/NOS National Ocean Service, NOAA, U.S. Department of Commerce Mailing and Physical

Center for Operational Oceanographic Products and Services (CO-OPS) NOAA's National Ocean Service 1305 East-West Hwy

Silver Spring MD 20910 USA (301) 713-2815 For questions, go to: http://tidesandcurrents.noaa.gov/contact.html 2010 document http://tidesandcurrents.noaa.gov/station_retrieve.shtml http://tidesandcurrents.noaa.gov/station_retrieve.shtml Tides and Currents Station Selection Bench Mark Data Sheets online 2007 2010 publication date Tide Station Data Sheets tidal information table from which vertical datum adjustment information are interpreted U.S. Army Corps of Engineers, Alaska District 2010 http://www.poa.usace.army.mil/hm/default.htm http://www.poa.usace.army.mil/hm/default.htm USACE Alaska District Hydrographic Surveys Digital database of hydrographic surveys in Alaska District download online 2008 ground condition USACE Hydrographic Surveys Hydrographic surveys for Alaska 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 2010 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 1915 2010 ground condition NOS Hydrographic Surveys hydrographic surveys downloaded from web site. Kenai Watershed Forum Kenai Peninsula Borough GIS Chris Clough Mailing and Physical Address

47140 East Poppy Lane

Soldotna AK 99669 USA (907) 776-5125 cclough@borough.kenai.ak.us 1998 http://www.borough.kenai.ak.us/gisdept/ Kenai Lidar ESRI Grid online 2008 2008 ground condition Kenai Lidar Lidar dataset acquired via ftp. Coastal Services Center 2008 http://www.csc.noaa.gov/ldart http://www.csc.noaa.gov/ldart Digital Coast Lidar Data Retrieval Tool Digital database of lidar surveys download online 2008 2008 Ground Condition Lidar surface lidar dataset collected and provided by NGS NASA > National Aeronautics and Space Administration 2008 http://srtm.usgs.gov/ http://srtm.usgs.gov/ Shuttle Radar Topography Mission global topography download on web 2000 ground condition NASA SRTM topography gridded topographic data downloaded from web site. All datasets obtained by NGDC were converted to common horizontal and vertical datums of NAD 83 geographic and MHW, respectively. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection. 20100503 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. 20100526 Coastline dataset was extracted and edited. 20101015 xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto 1/3 arc-second grid inside the bay 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. 20101018 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. 20101025 The MHW DEM was quantitatively evaluated by comparing with source datasets and with elevation values extracted from NGS geodetic monuments. 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. 20101108 The MHW DEM was qualitativley evaluated through comparison with nautical charts. 20101110 Raster ASCII text Grid Cell 5401 13069 1 0.00009259259 0.00009259259 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 Meah 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 455000000 http://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/707 http://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/707 Kachemak Bay, AK 1/3 arc-second Tsunami Inundation DEM DEM, metadata and Readme file for the Kachemak Bay, Alaska DEM. download http://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/707 Kachemak Bay, AK 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 http://www.ngdc.noaa.gov/metadata/extensions/local_extensions.html NGDC Extensions to FGDC Metadata