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Metadata Identifier: gov.noaa.ngdc.mgg.dem:722

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 Tampa Bay Topographic/Bathymetric Digital Elevation Model In this joint demonstration project for the Tampa Bay region, NOAA's National Ocean Service (NOS) and the U.S. Geological Survey (USGS) have merged NOAA bathymetric and USGS topographic data sets into a hybrid digital elevation model (DEM) with all data initially referenced to the ellipsoid, but transformable to any of 28 orthometric, 3-D, or tidal datums.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 GEODAS Hydrographic Survey Database
  • 2000-01-01
1 NASA/GCMD Data Center Keywords
    1 NASA/GCMD Data Resolution Keywords
      1 NASA/GCMD Earth Science Keywords
        1 NASA/GCMD Platform Keywords
          1 NOS Data Explorer Topic Category
            1 North American Datum 1983
            • 2007-01-19
            1 North American Vertical Datum 1988
            • 2012-08-10
            1 Tampa Bay Topographic/Bathymetric Digital Elevation Model
            • 2001-04-05
            1 USGS National Elevation Dataset NED
            • 1999-01-01
            1 none
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              CI_Series

              none found
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              CI_ResponsibleParty

              Count Component Individual Organization Position Email Role Linkage
              2 resourceProvider http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269
              2 Barry W. Eakins DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Research Scientist Barry.Eakins@noaa.gov pointOfContact
              1 Barry W. Eakins DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Research Scientist Barry.Eakins@noaa.gov distributor
              1 Dean Gesch United States Geological Survey (USGS), Earth Resources Observation Systems (EROS) Data Center gesch@usgs.gov pointOfContact
              2 EPSG Registry European Petroleum Survey Group publisher http://www.epsg-registry.org/
              1 National Environmental Satellite, Data, and Information Service (NESDIS), National Geophysical Data Center (NGDC) publisher
              1 National Oceanic and Atmospheric Administration (NOAA), National Environmental Satellite, Data, and Information Service (NESDIS), National Geophysical Data center (NGDC) originator
              1 National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS), Coast Survey Development Laboratory (CSDL) originator
              1 U.S. Geological Survey publisher
              1 U.S. Geological Survey, EROS Data Center; and NOAA's Ocean Service, Office of Coast Survey (OCS) publisher
              1 United States Geological Survey originator
              1 United States Geological Survey, Earth Resources Observation Systems (EROS) Data Center originator
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              CI_OnlineResource

              Count Component Linkage Name Description Function
              2 http://www.epsg-registry.org/ European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search
              1 http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269 NAD83 Link to Geographic Markup Language (GML) description of reference system. information
              1 http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:datum:EPSG::5103 NAVD88 Link to Geographic Markup Language (GML) description of reference system. information
              1 http://www.ngdc.noaa.gov/dem/squareCellGrid/download/722 Tampa Bay, FL 1 arc-second NAVD88 DEM Download page for accessing DEM and metadata record. download
              1 http://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/717?gridFormat=ESRI+Arc+ASCII Tampa Bay, FL 1 arc-second NAVD88 DEM DEM and metadata file for the Tampa Bay DEM. download
              1 http://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/722?gridFormat=binary+float Tampa Bay, FL 1 arc-second NAVD88 DEM Download page for accessing DEM and metadata record. download
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              MD_Identifier or RS_Identifier

              Count Component Code
              1 urn:ogc:def:crs:EPSG::4269
              1 urn:ogc:def:datum:EPSG::5103
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              EX_Extent

              Bounding Box Temporal Extent
              Count Component Description West East North South Start End
              1 -82.875000 -82.375000 28.125000 27.375000 1945-01-01 1999-01-01
              1 1945-01-01 1996-01-01
              1
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              EX_GeographicBoundingBox

              Count Component West East North South
              1 -82.875000 -82.375000 28.125000 27.375000
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              EX_TemporalExtent

              Count Component Start End
              1 1945-01-01 1999-01-01
              1 1945-01-01 1996-01-01
              1
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              MD_Format

              Count Component Name Version specification
              1 binary float 1 binary float
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              MD_Medium

              none found
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              MD_Constraints

              Count Component Use Limitation
              1 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.
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              MD_ReferenceSystem

              Count Component Code Authority Title
              1 NAD83 urn:ogc:def:crs:EPSG::4269 North American Datum 1983
              1 NAVD88 urn:ogc:def:datum:EPSG::5103 North American Vertical Datum 1988
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              MD_GridSpatialRepresentation

              Count Component Number of Dimensions Cell Geometry Code
              1 3 area
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              MD_Georeferenceable or MI_Georeferenceable

              none found
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              MD_Georectified or MI_Georectified

              none found
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              MD_Dimension

              Count Component Name Code Size
              1 row 2700
              1 column 1800
              1 vertical 1
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              MD_CoverageDescription or MI_CoverageDescription

              none found
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              MD_Band or MI_Band

              none found
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              MI_RangeElementDescription

              none found
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              MD_AggregateInformation

              none found
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              LE_Source or LI_Source

              Count Component Title Date Description
              1 GEODAS Hydrographic Survey Database 2000-01-01 Source Contribution: Bathymetric data was used to develop a seamless bathymetric/topographic DEM for the Tampa Bay region. Source Type: CD-ROM
              1 USGS National Elevation Dataset NED 1999-01-01 Source Contribution: Topographic data was used to develop a seamless bathymetric/topographic DEM for the Tampa Bay region. Source Type: CD-ROM
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              LE_ProcessStep or LI_ProcessStep

              Count Component DateTime Description
              1 2001-01-01T00:00:00 A seamless bathymetric/topographic digital elevation model (DEM) was developed by merging the "best available" bathymetric data from NOAA and topographic data for USGS. Each of the datasets was initially processed independently to apply the "best available" criteria to select the data to be merged. Prior to merging, the selected data were transformed to a common reference coordinate system, both horizontally and vertically.The selected topography points within the shoreline buffer zone and the bathymetry points were gridded to produce a raster surface model with a 1-arc-second grid spacing to match the resolution of NED. The points were input to an implementation of the ANUDEM thin plate spline interpolation algorithm, which is optimized for generation of topographic surfaces. The bathymetry points could have been gridded independently of the topographic data, but the shoreline zone land elevations were included in the interpolation to ensure a better match of the bathymetric and topographic surfaces for the subsequent mosaicing step. To avoid introduction of any interpolation edge effects into the merged elevation model, the output grid from the interpolation was clipped to include only land elevations within 300 meters of the shoreline. The final processing step involved the mosaicing of the bathymetry grid and the NED elevation grid. The values in the 300-meter overlap area were blended by weighted averaging, where the weights for each grid are determined on a cell-by-cell basis according to the cell's proximity to the edges of the overlap area. The resulting final merged product is a seamless bathymetric/topographic model covering the Tampa Bay region at a grid spacing of 1-arc-second. The vertical coordinates represent elevation in decimal meters relative to the GRS80 ellipsoid, and the horizontal coordinates are decimal degrees of latitude and longitude referenced to the NAD83 datum.Process Date Range is 2000 - 2001
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              MI_Operation

              none found
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              MI_Platform

              none found
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              MI_Instrument

              none found
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