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ETOPO1 1 Arc-Minute Global Relief Model

browse graphicImage of ETOPO1 1 Arc-Minute Global Relief Model
In August 2008, the National Geophysical Data Center (NGDC), an office of the National Oceanic and Atmospheric Administration (NOAA), developed the ETOPO1 Global Relief Model as an improvement to the ETOPO2v2 Global Relief Model. ETOPO1 is available in "Ice Surface" (top of Antarctic and Greenland ice sheets) and "Bedrock" (base of the ice sheets) versions. Both versions of ETOPO1 were generated from diverse global and regional digital data sets, which were shifted to common horizontal and vertical datums, and then evaluated and edited as needed. Bathymetric, topographic, and shoreline data used in ETOPO1 were obtained from NGDC, Antarctic Digital Database (ADD), European Ice Sheet Modeling Initiative (EISMINT), Scientific Committee on Antarctic Research (SCAR), Japan Oceanographic Data Center (JODC), Caspian Environment Programme (CEP), Mediterranean Science Commission (CIESM), National Aeronautics and Space Administration (NASA), National Snow and Ice Data Center (NSIDC), Scripps Institute of Oceanography (SIO), and Leibniz Institute for Baltic Sea Research (LIBSR). ETOPO1 is vertically referenced to sea level, and horizontally referenced to the World Geodetic System of 1984 (WGS 84). Cell size for ETOPO1 is 1 arc-minute.
Cite as: Amante, C. and B.W. Eakins, 2009. ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24. National Geophysical Data Center, NOAA. doi:10.7289/V5C8276M [access date].
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  • netCDF (Version:4.3.1)
    • File Compression: GZIP
  • GRD98
    • File Compression: GZIP
  • binary
    • File Compression: GZIP
  • xyz
    • File Compression: GZIP
  • georeferenced tiff
    • File Compression: GZIP
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Distributor Distributor information not available
Dataset No POCs available for this dataset
General Documentation
Associated Resources
Date(s)
  • publication: 2009-01-01
Edition: First
Dataset Progress Status Complete
Data Update Frequency: As needed
Purpose: Developed to support global research, exploration, and education
Originator(s)
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Publisher(s)
    Publisher information not available.
Time Period: 1940-01-01 to 2008-01-01
Spatial Reference System:
Spatial Bounding Box Coordinates:
N: 90.00
S: -90.00
E: 180.00
W: -180.00
Spatial Coverage Map:
Theme keywords Global Change Master Directory (GCMD) Science and Services Keywords
  • EARTH SCIENCE > OCEANS > Marine Geophysics > Continental Shelves
  • EARTH SCIENCE > OCEANS > Bathymetry > Seafloor Topography
  • EARTH SCIENCE > OCEANS > Marine Geophysics > Continental Rises/Slopes
  • EARTH SCIENCE > OCEANS > Bathymetry > Water Depths
  • EARTH SCIENCE > OCEANS > Coastal Processes > Coastal Elevation
INFOTERRA Keyword Thesaurus
  • INFOTERRA > Subject disciplines > Geophysics > Geophysics
  • INFOTERRA > Subject disciplines > Geomorphology > Geomorphology
Uncontrolled
  • Global relief
  • Gridded elevations
  • Integrated bathymetry and topography
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • DEM > Digital Elevation Model
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Geographic Region > Global Land
  • Geographic Region > Global Ocean
Keywords
    Keywords
      Use Constraints No constraint information available
      Other Constraints Cite as: Amante, C. and B.W. Eakins, 2009. ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24. National Geophysical Data Center, NOAA. doi:10.7289/V5C8276M [access date].
      Fees
      • None
      Lineage information for: dataset
      Processing Steps
      • 2008-06-17T00:00:00 - All datasets obtained by NGDC were converted to common horizontal and vertical datums of WGS 84 and sea level, respectively, using FME. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection.
      • 2008-06-25T00:00:00 - Datasets were visually inspected with ArcGIS for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
      • 2008-06-30T00:00:00 - Coastline datasets were adjusted to fit satellite imagery.
      • 2008-07-10T00:00:00 - xyz files of the Measured and Estimated Seafloor Topography data (between -500 m and 0 m) were surfaced using GMT's 'surface' tool onto a 1 arc-minute cell size grid that interpolated to fill empty cells. Points extracted along the GSHHS coastline were also included, at -1 m elevation, to force bathymetric interpolation into the coastal zone. The resulting Arc ASCII grid was clipped to the coastline and the -120 m contour to remove values over land and non-coastal waters.
      • 2008-07-18T00:00:00 - 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 the NSIDC Antarctica RAMP topography dataset. Least weight was given to the global datasets and the interpolated bathymetric surface. Gridding was performed in 16 regional tiles, each with a 5% data buffer. The grids were imported in ArcGIS and seamlessly merged to create the final global relief model.
      • 2008-07-31T00:00:00 - ETOPO1 was bult as a global, grid-registered, 1 arc-minute grid that spans from pole to pole and from -180 degrees to 180 degrees in longitude. It is 21601 cells by 10801 cells in dimension, with multiple duplicate cells sitting atop the North and South poles and on the -180 degrees and 180 degrees longitude line. A cell-registered version (21600 by 10800 cells) was created from the grid-registered version by resampling, using GMT's 'grdsample' tool. This resampling introduces some flattening of relief, due to averaging of four grid-registered cell vlaues to produce one cell-registered value. Both types are global, though the grid-registered version should be considered the authoritative version. The cell-registered version may be more appropriate for creating maps and images.
      Processing Environment Native Dataset Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2
      Source Datasets
      • ADD Antarctica Coastline
        • Antarctica Coastline (download)
          Antarctica coastline data
        • Description of Source: Source Contribution: Antarctica coastline data downloaded from web site ; Source Type: online
        • Temporal extent used: 1993-01-01 to 2006-01-01
      • NGDC Gulf of California Bathymetry
        • NGDC Multibeam Bathymetry Database (download)
          Multibeam swath sonar survey data
        • Description of Source: Source Contribution: Multibeam bathymetry data downloaded from web site ; Source Type: online
        • Temporal extent used: Unknown to
      • CEP Isolines of the Bathymetry of the Caspian Sea
        • Isolines of the Bathymetry of the Caspian Sea (download)
          Isolines of the bathymetry is used for showing the depths of the Caspian Sea
        • Description of Source: Source Contribution: Caspian Sea bathymetric isolines downloaded from web site. ; Source Type: online
        • Temporal extent used: 1987-01-01 to 1999-01-01
      • CIESM Morpho-bathymetry of the Mediterranean Sea
        • Morpho-bathymetry of the Mediterranean Sea (download)
          Grid derived from multibeam swath sonar bathymetric surveys
        • Description of Source: Source Contribution: Bathymetric grid of the Mediterranean sea derived from multibeam swath sonar bathymetric surveys downloaded from web site ; Source Type: online
        • Temporal extent used: Unknown to
      • Measured and Estimated Seafloor Topography
        • Measured and Estimated Seafloor Topography (download)
          Grid derived from known soundings and sea-surface altimetry measurements
        • Description of Source: Source Contribution: Grid derived from known soundings and sea-surface altimetry measurements downloaded from web site ; Source Type: online
        • Temporal extent used: 1997-01-01 to 2008-01-01
      • A high resolution spherical grid topography of the Baltic Sea 2nd edition
      • International Bathymetry Chart of the Arctic Ocean (IBCAO)
        • IBCAO (download)
          Digital data base that contains all available bathymetric data north of 64 degrees North
        • Description of Source: Source Contribution: Digital data base that contains all available bathymetric data north of 64 degrees North downloaded from web site ; Source Type: online
        • Temporal extent used: 1999-01-01 to 2008-01-01
      • NGDC U.S Coastal Relief Model
        • U.S Coastal Relief Model (download)
          Integrated coastal bathymetric and topographic relief model
        • Description of Source: Source Contribution: U.S Coastal Relief Model downloaded from web site ; Source Type: online
        • Temporal extent used: 1999-01-01 to 2005-01-01
      • NGDC U.S Great Lakes Bathymetry
        • U.S Great Lakes Bathymetry (download)
          Grid of U.S Great Lakes bathymetry
        • Description of Source: Source Contribution: U.S Great Lakes Bathymetry downloaded from web site ; Source Type: online
        • Temporal extent used: 1996-01-01 to 2005-01-01
      • Shuttle Radar Topography Mission (SRTM)
        • Shuttle Radar Topography Mission (download)
          global topography
        • Description of Source: Source Contribution: gridded topographic data downloaded from web site. ; Source Type: online
        • Temporal extent used: Unknown to
      • Global Land One-km Base Elevation (GLOBE)
        • Global Land One-km Base Elevation (GLOBE) (download)
          A 30-arc-second (1-km) gridded, quality-controlled global Digital Elevation Model (DEM)
        • Description of Source: Source Contribution: gridded topographic data downloaded from web site ; Source Type: online
        • Temporal extent used: 1940-01-01 to 1999-01-01
      • NSIDC Antarctica Radarsat Antarctic Mapping Project (RAMP) Topography
        • RAMP DEM Version 2 (download)
          400 m grid of Antarctica ice surface
        • Description of Source: Source Contribution: NSIDC 400 m elevation grid of Antarctica ice surface downloaded from web site ; Source Type: online
        • Temporal extent used: 1940-01-01 to 2001-01-01
      • NSIDC Greenland Bedrock
      Last Modified: 2016-03-11
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