NOAA Office for Coastal Management Coastal Inundation Digital Elevation Model: Honolulu Weather Forecast Office (HFO WFO) - Oahu
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise (SLR) and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: http://www.coast.noaa.gov/slr This metadata record describes the Honolulu Weather Forecast Office (HFO WFO) digital elevation model (DEM), which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer described above. The DEMs created for this project were developed using the NOAA National Weather Service's Weather Forecast Office (WFO) boundaries. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications for the Honolulu WFO, which includes the following islands in Hawaii: Kauai, Oahu, Molokai, Maui, Lanai, and Hawaii. The DEM is derived from multiple sources. 1. 2003 Oahu Coastline Lidar - acquired by NOAA 2. 2005 Oahu/Maui Lidar - acquired by NOAA 3. 2006 Hawaii FEMA Lidar - acquired by FEMA along south shores of islands 4. 2007 USACE Pacific Islands Lidar: Hawaiian Islands - acquired by USACE and Hawaii State Civil Defense along north and windward facing shores of islands Hydrographic breaklines were delineated from LiDAR intensity imagery generated from the LiDAR datasets. The final DEM is hydro flattened such that water elevations are less than or equal to -0.5 meters. The DEM is referenced vertically to the Local Mean Sea Level (LMSL) tidal datum with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is 3 meters.
Published By US Census Bureau, Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The purpose of this file is to provide the geography for the 2010 Census Blocks along with their 2010 housing unit count and population. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by nonvisible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and roads. Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces.
Published By National Aeronautics and Space Administration
Issued mehr als 9 Jahre ago
Summary
Description
In Sub-topic O3.04, NASA has identified a need for control of material degradation to extend the life and reduce the life-cycle costs of piping systems subject to microbial influenced corrosion in the presence of untreated or brackish water. The corrosion mechanisms of greatest interest are salt and acid attack due to exposure to brackish and untreated waters. International Scientific Technologies, Inc., in conjunction with Ferrum College, proposes the development of a protective barrier conversion coating to prevent corrosion cell formation in steel substrates.
Missouri River bed elevations near Omaha Public Power District transmission tower surveyed during 2011 flood on June, 21
Published By U.S. Geological Survey, Department of the Interior
Issued mehr als 9 Jahre ago
Summary
Description
A RESON SeaBat⢠7125 multibeam echosounder in conjunction with an Applanix Position Orientation Solution for Marine Vessels (POS MVâ¢) WaveMaster system motion sensor, HYPACK®/HYSWEEP® navigation software, and Ashtech Z-Xtreme GPS receivers or Trimble R8 receivers was used to survey the Missouri River bed at 15 pipeline crossings at four different locations, at three power plant locations, and at one transmission tower during the 2011 flood event. The format of this data is a grid with each cell covering 0.5 meter by 0.5 meter. The elevation value (North American Vertical Datum, NAVD88) represented by each cell is the most probable elevation for that cell based on calculated Total Propagated Uncertainty (TPU) as calculated in Caris HIPS and SIPS software. Calculated TPS values are then used by Caris to create a Combined Uncertainty and Bathymetric Estimator (CUBE) surface. The surface grid was used to export the cell centroid position (Northing, Easting in UTM zone 14 North, in meters) along with the cell elevation (referenced to NAVD88, in meters) to create the text file. The data were collected by the U.S. Geological Survey in cooperation with the Environmental Protection Agency (EPA) and the Omaha Public Power District (OPPD).
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Mean Annual R-factor, 1971-2000
Published By U.S. Geological Survey, Department of the Interior
Issued mehr als 9 Jahre ago
Summary
Description
This data set represents the average annual R-factor, rainfall-runoff erosivity measure, compiled for every catchment of NHDPlus for the conterminous United States. The source data are from Christopher Daly of the Spatial Climate Analysis Service, Oregon State University, and George Taylor of the Oregon Climate Service, Oregon State University (2002), who developed spatially distributed estimates of R-factor for the period 1971-2000 for the conterminous United States. The NHDPlus Version 1.1 is an integrated suite of application-ready geospatial datasets that incorporates many of the best features of the National Hydrography Dataset (NHD) and the National Elevation Dataset (NED). The NHDPlus includes a stream network (based on the 1:100,00-scale NHD), improved networking, naming, and value-added attributes (VAAs). NHDPlus also includes elevation-derived catchments (drainage areas) produced using a drainage enforcement technique first widely used in New England, and thus referred to as "the New England Method." This technique involves "burning in" the 1:100,000-scale NHD and when available building "walls" using the National Watershed Boundary Dataset (WBD). The resulting modified digital elevation model (HydroDEM) is used to produce hydrologic derivatives that agree with the NHD and WBD. Over the past two years, an interdisciplinary team from the U.S. Geological Survey (USGS), and the U.S. Environmental Protection Agency (USEPA), and contractors, found that this method produces the best quality NHD catchments using an automated process (USEPA, 2007). The NHDPlus dataset is organized by 18 Production Units that cover the conterminous United States. The NHDPlus version 1.1 data are grouped by the U.S. Geologic Survey's Major River Basins (MRBs, Crawford and others, 2006). MRB1, covering the New England and Mid-Atlantic River basins, contains NHDPlus Production Units 1 and 2. MRB2, covering the South Atlantic-Gulf and Tennessee River basins, contains NHDPlus Production Units 3 and 6. MRB3, covering the Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy River basins, contains NHDPlus Production Units 4, 5, 7 and 9. MRB4, covering the Missouri River basins, contains NHDPlus Production Units 10-lower and 10-upper. MRB5, covering the Lower Mississippi, Arkansas-White-Red, and Texas-Gulf River basins, contains NHDPlus Production Units 8, 11 and 12. MRB6, covering the Rio Grande, Colorado and Great Basin River basins, contains NHDPlus Production Units 13, 14, 15 and 16. MRB7, covering the Pacific Northwest River basins, contains NHDPlus Production Unit 17. MRB8, covering California River basins, contains NHDPlus Production Unit 18.
Published By Federal Laboratory Consortium
Issued mehr als 9 Jahre ago
Summary
Description
Research Area: Herbs, Dietary Supplements Program:Centers for Dietary Supplements Research: Botanicals Description:The goal of this center is to delineate the molecular mechanisms by which botanical oils, such as borage oil, may prevent or affect disease (cardiovascular disease, asthma and metabolic syndrome) while focusing on immunity and inflammation. The center will also examine the influence of genetic differences in the metabolism of botanicals to determine the populations where they are most likely to beeffective.
Orthorectification and Mosaicking of Color Aerial Photography for the Main Eight Hawaiian Islands: Hawaii (417-0620)
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
Habitat maps of the main Hawaiian Islands were created by visual interpretation of aerial photos and hyperspectral imagery using the Habitat Digitizer extension. Aerial photographs are valuable tools for natural resource managers and researchers since they provide an excellent record of the location and extent of habitats. However, spatial distortions in aerial photographs due to such factors as camera angle, lens characteristics, and relief displacement must be accounted for during analysis to prevent incorrect measurements of area, distance, and other spatial parameters. These distortions of scale within an image can be removed through orthorectification. During orthorectification, digital scans of aerial photos are subjected to algorithms that eliminate each source of spatial distortion. The result is a georeferenced digital mosaic of several photographs with uniform scale throughout the mosaic. Features near land are generally georeferenced with greater accuracy while the accuracy of features away from land is generally not as good. Where no land is in the original photographic frame only kinematic GPS locations and image tie points were used to georeference the images. After an orthorectified mosaic is created, photointerpreters can accurately and reliably delineate boundaries of features in the imagery as they appear on the computer monitor using a software interface such as the Habitat Digitizer.
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
Protection and restoration of coastal watersheds requires the synthesis of complex environmental issues. Contaminated site remediation, dredging and disposal of contaminated sediments, and restoring injured habitats are a few of the challenges facing coastal managers. The evaluation of multiple environmental issues can be significantly improved by combining scientific data and watershed characteristics into a Geographic Information System (GIS).NOAA's Coastal Protection and Restoration Division (CPRD) has developed decision-support tools for specific watersheds around the country that combine the use of a standard database structure, database-mapping application, and GIS. CPRD Watershed Database & Mapping Projects facilitate sediment and tissue chemistry and bioeffects data, natural resources, and potential habitat restoration projects to be overlaid on a watershed's features and land uses, and displayed on maps at flexible spatial scales. This approach simplifies data analysis and presentation, provides valuable tools for complex decision-making, and improves our understanding of dynamic aquatic ecosystems.
Published By National Aeronautics and Space Administration
Issued mehr als 9 Jahre ago
Summary
Description
Research suggests that: (1) orbital debris has reached an unstable point whereby, even with no future launches, the amount of debris will continue to grow through collisions among large-body debris, and (2) removing as few as five large objects each year can stabilize debris growth. For large-body active debris removal (ADR), active technologies are required to safely and efficiently stabilize and capture the target debris. The interactions of these complex electromechanical systems (eg. imaging systems, LIDAR, robotic arms and grippers, etc) and control algorithms pose challenges best addressed by hardware-in-the-loop testing. Given the risks inherent in non-cooperative spacecraft proximity operations, and the firm requirement that ADR missions do not themselves produce additional debris, realistic ground-based testing is required for risk reduction. Testing space operations in ground-based facilities is notoriously difficult and limited. Our proposed approach significantly increases the capability and fidelity of such testing operations and elevates the chance of a successful ADR mission. We propose a combination of robotic technologies to allow for a large range of relative motion simulation with accurate contact dynamics. First, the target debris object is suspended from a thin rod and spun up to a desired rotational speed. The suspension point is actively controlled to remove the periodic pendulum effect while still allowing free motion from contact, and a universal joint permits free rotational motion. Second, the chaser spacecraft is mounted atop HOMER, an omnidirectional robot capable of unlimited planar motion and limited-range out-of-plane motion. HOMER was designed and built by Texas A&M to emulate the 6-DOF relative-motion trajectories common in spacecraft proximity operations. Along with careful attention paid to the design of mock-targets, these two systems will allow for large-scale motion with accurate contact dynamics for high-fidelity ADR testing.
Published By National Aeronautics and Space Administration
Issued mehr als 9 Jahre ago
Summary
Description
Radiation-cooled, bipropellant thrusters are being considered for the Ascent Module main engine of the Altair Lunar Lander. Currently, iridium-lined rhenium combustion chambers are the state-of-the-art for radiatively cooled thrusters. To increase the performance of radiation-cooled engines, improved chamber materials are needed that will allow higher operating temperatures, better resistance to oxidation, and reduce mass. During this effort, an innovative composite thrust chamber is being developed that will incorporate advanced ceramic oxide and iridium liner techniques as well as replacing the expensive, high density rhenium with a low mass carbon-carbon composite. The Phase I results have demonstrated the potential of combining innovative fabrication techniques to produce an advanced ceramic-Ir lined C-C thrust chamber. Hot gas testing has shown the ability of the ceramic oxide coating to reduce the exterior temperature of the C-C jacket, which will enable the use of higher temperature propellants for improved performance. No damage was observed in the ceramic-Ir liner as a result of hot gas testing. During Phase II, the techniques will be optimized to allow fabrication of a 3000 lbf chamber that will be delivered to NASA-MSFC for hot-fire testing.
Published By Department of Justice
Issued mehr als 9 Jahre ago
Summary
Description
The National Corrections Reporting Program gathers data on prisoners entering and leaving the custody or supervision of state and federal authorities. The dataset is comprised of four types of data: prisoners who were admitted to prison (Part 1), released
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
Hourly Precipitation Data (HPD) Publication is archived and available from the National Climatic Data Center (NCDC). This publication contains hourly precipitation amounts obtained from recording rain gauges located at National Weather Service, Federal Aviation Administration, and cooperative observer stations. Published data are displayed in inches to tenths or inches to hundredths at local standard time. HPD includes maximum precipitation for nine (9) time periods from 15 minutes to 24 hours, for selected stations. The HPD publication is also available as digital data set DSI-3240 (C00313).
Published By Department of Veterans Affairs
Issued mehr als 9 Jahre ago
Summary
Description
The paper provids analytical support to the VA by reporting on the state-by-state and VA regional office variation in disability compensation claims, ratings, and monetary benefits.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued mehr als 9 Jahre ago
Summary
Description
Terrain data, as defined in FEMA Guidelines and Specifications, Appendix N: Data Capture Standards, describes the digital topographic data that were used to create the elevation data representing the terrain environment of a watershed and/or floodplain. Terrain data requirements allow for flexibility in the types of information provided as sources used to produce final terrain deliverables. Once this type of data is provided, FEMA will be able to account for the origins of the flood study elevation data. (Source: FEMA Guidelines and Specifications, Appendix N, Section N.1.2).LIDAR data is remotely sensed high-resolution elevation data collected by an airborne collection platform. By positioning laser range finding with the use of 1 second GPS with 100hz inertial measurement unit corrections; Terrapoint's LIDAR instruments are able to make highly detailed geospatial elevation products of the ground, man-made structures and vegetation. The LiDAR flightlines for this project was planned for a 50% acquisition overlap. The nominal resolution of this project without overlap is 1.25m (Optech) and 1m (ALTMS) spacing. Four returns were recorded for each pulse in addition to an intensity value. GPS Week Time, Echo, Intensity, Flightline number and scan angle attributes were provided for each LiDAR point. Data is provided as random points, in LAS v1.0 format, classified according to ASPRS Class Code 2=Ground 1=Undefined.
Published By National Aeronautics and Space Administration
Issued mehr als 9 Jahre ago
Summary
Description
Advanced Scientific Concepts, Inc. (ASC) has developed a number of 3D Flash LIDAR systems. Flash LIDAR sensors are 3D video systems that return range and intensity for each pixel in real time. ASC's Flash LIDAR has been used for autonomous berthing with the International Space Station and is currently under development for the OSIRIS-REx asteroid rendezvous mission. Flash LIDAR is also being evaluated by JPL and NASA for Entry Decent and Landing for ALHAT and Mars. All of these applications use avalanche photodiode (APD) arrays in the camera focal plane array. APDs are complex epitaxially grown structures and biased at relatively high voltages (50-70V). These arrays have a poor fill factor that is compensated by micro-lenses. These micro-lenses are restricted to F/#s greater than about 3.3 which in turn limits the effective receive aperture. If micro-lenses were unnecessary, an F/1 receive aperture could increase the collection area by a factor of 10 with no increase in noise. This should result in an increased SNR of approximately 40% but, because of the simplicity of PINs compared to APDs, an increase in reliability as well. PINs are more radiation hard than APDs, are more operationally stable (therefore do not require individual fuses to protect against the development of high dark current pixels), inherently have lower dark current (lower noise), and are inherently more uniform. In addition low-voltage FPA drive electronics is easier to design than high voltage circuitry. These improvements will result in a more reliable higher performance array.  
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
Daily U.S. minimum and maximum temperatures in whole degrees Fahrenheit and reported and estimated precipitation amounts in hundredths of inches(ex 100 is 1.00 inches) generated from the Global Telecommunications System (GTS) metar(hourly) and synoptic(6-hourly) observations.
A site-specific assessment of the risk of ammonia to endangered Colorado Pikeminnow and Razorback Sucker populations in the upper Colorado River adjacent to the Atlas Mill Tailings Pile, Moab, Utah
Published By US Fish and Wildlife Service, Department of the Interior
Issued mehr als 9 Jahre ago
Summary
Description
The Atlas Mill Tailings Pile is located adjacent to the Upper Colorado River near Moab, Utah. Milling of ore ceased in 1984 and the Atlas Corporation subsequently declared bankruptcy. The U.S. Department of Energy USDOE is the current manager of the site and is evaluating cleanup options that include remediation of groundwater at the site. This reach of the Upper Colorado River was declared as critical habitat for two endangered fish species Colorado pikeminnow, Ptychocheilus lucius and razorback sucker, Xyrauchen texanus by the U.S. Fish and Wildlife Service USFWS because it is one of the few existing areas that contains known spawning and rearing habitats for these fishes. Monitoring data indicates that the groundwater entering the Upper Colorado River is contaminated with ammonia, metals, and radiochemicals. The USFWS is concerned that contaminated groundwater from the Atlas Mill Tailings Pile may be impacting endangered fish populations within this critical habitat. The U.S. Geological Survey USGS conducted a sitespecific risk assessment to determine if groundwater entering the Upper Colorado River from beneath the tailings pile could impact populations of the endangered Colorado pikeminnow and razorback sucker. Spatial mapping of contaminant plumes in the river was conducted over several hydrologic regimes and seasons from August 1998 to August 2000. Laboratory and field toxicity tests were conducted with Colorado pikeminnow, razorback sucker, and fathead minnow Pimephales promelas to determine their sensitivity to ammonia and site waters. The effects of contaminated groundwater on macroinvertebrate communities were also assessed. Results indicated that the Atlas Mill Tailings Pile represents a localized source of groundwater input containing elevated levels of ammonia, metals, and radiochemicals that exceed Utah state water quality criteria during the lowwater hydrologic period ranging from August to March. Toxicity testing indicated that Colorado pikeminnow, razorback sucker, and fathead minnow were of similar sensitivity to ammonia with 28d LOEC values for mortality ranging from 2.19 to 4.35 mgL total ammonia at pH8.25 and temperature 25 C 0.14 to 0.31 mgL unionized ammonia. Mortality and growth endpoints were similar in sensitivity to ammonia for the three species. Onsite toxicity tests demonstrated that site waters were directly toxic to both the endangered Colorado pikeminnow as well as the standard surrogate fathead minnow. Highest observed field concentrations caused instantaneous mortality in both controlled laboratory and insitu field studies. Comparisons of laboratory and field results indicate that ammonia is the primary contaminant of concern due to high exposures and the rapid onset of toxicity. Metals and radiochemicals, although sometimes elevated above criteria, did not contribute to toxicity. There were no statistically significant differences in macroinvertebrate distributions that could be attributed to contaminated groundwater. Collectively, the data indicate that the Atlas Mill Tailings Pile represents a localized input of contaminated groundwater that threatens endangered fish species in the area. The current Utah state water quality criteria for total ammonia is 0.71 mgL assuming average conditions of pH8.25 and temperature 25 C, or approximately 0.06 mgL unionized ammonia. The Utah state water quality criteria for ammonia, if met, would be protective of Colorado pikeminnow and razorback sucker by a factor of at least 2 based on conservative toxicity endpoints. Therefore, remediation of groundwater entering the Colorado River to meet existing Utah state water quality criteria for ammonia would eliminate toxicological concerns for Colorado pikeminnow and razorback sucker.
Published By Federal Geographic Data Committee
Issued mehr als 9 Jahre ago
Summary
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued mehr als 9 Jahre ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12000.
Published By Department of Homeland Security
Issued mehr als 9 Jahre ago
Summary
Description
System enables airports to accurately determine the level of staff control required for a given flight schedule. Used by TSA Scheduling operations to create work schedules for passenger and baggage screeners based on expected airport traffic as per regis
Published By Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
Cities, towns, and villages that have been incorporated, disincorporated, or changed their name between 2000 and 2010. Includes effective dates and city, county, and state names and codes.
Published By U.S. Geological Survey, Department of the Interior
Issued mehr als 9 Jahre ago
Summary
Description
This layer of the 3D Elevation Program (3DEP) is 1/3 arc-second (approximately 10 m) resolution. The 1/3 arc-second 3DEP products and services are derived from diverse source data that are processed to a common coordinate system and unit of vertical measure. These data are distributed in geographic coordinates in units of decimal degrees, and in conformance with the North American Datum of 1983 (NAD 83). All elevation values are in meters and, over the continental United States, are referenced to the North American Vertical Datum of 1988 (NAVD88). The 1/3 arc-second 3DEP products and services provide seamless coverage of the conterminous United States, Hawaii, Puerto Rico, other territorial islands, and in limited areas of Alaska. The 1/3 arc-second 3DEP projects and services are available as pre-staged products tiled in 1 degree blocks in Erdas .img, ESRI arc-grid, and grid float formats. 3DEP products and services are updated continually as new data become available. All 3DEP data are in the public domain.
Published By Department of Labor
Issued mehr als 9 Jahre ago
Summary
Description
The U.S. Department of Labor has been working collaboratively with our state partners to identify several robust strategies that focus on the prevention of overpayments and will yield the highest impact in reducing UI improper payment rates. Improper Unemployment Insurance benefit payments are most likely to occur when: Recipients continue to claim benefits after returning to work; Employers or their third party administrators do not submit timely or accurate separation information; and Claimants fail to register with the state's Employment Service (ES) as dictated by state law. Earlier this year, the Department actively intervened to encourage the ten states with the highest Employment Service registration error rates to focus on the issue. Senior DOL officials personally contacted these states to determine specific steps the states would take to address their error rates, and the Department provided targeted technical assistance. As a result, dramatic progress is being made in this area, with a 23% reduction in improper payments to people who did not register with employment services agencies, including a more than 35% drop in eight states.
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
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 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).
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued mehr als 9 Jahre ago
Summary
Description
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 the vertical tidal datum of North American Vertical Datum of 1988 (NAVD 88) or Mean High Water (MHW) and horizontal datum of World Geodetic System 1984 (WGS84). Cell size for the DEMs ranges from 1/3 arc-second (~10 meters) to 3 arc-seconds (~90 meters).