ETOPO1 1 Arc-Minute Global Relief Model (original) (raw)
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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: NOAA National Geophysical Data Center. 2009: ETOPO1 1 Arc-Minute Global Relief Model. NOAA National Centers for Environmental Information. Accessed [date].
Please refer to Credit tab for full citation information.
Complete - production of the data has been completedHistorical archive - data has been stored in an offline storage facility
Data Update Frequency
As needed
Purpose
Developed to support global research, exploration, and education
Use Limitations
Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series. Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
Dataset Citation
Cite as: NOAA National Geophysical Data Center. 2009: ETOPO1 1 Arc-Minute Global Relief Model. NOAA National Centers for Environmental Information. Accessed [date]. Also cite the NOAA Technical Memorandum: 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].
Cited Authors
NOAA National Geophysical Data Center
Publishers
NOAA National Centers for Environmental Information
Theme keywords
Global Change Master Directory (GCMD) Science Keywords Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry Earth Science > Oceans > Bathymetry/Seafloor Topography > Continental Margins Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth 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 Global Change Master Directory (GCMD) Service Keywords DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING Global Change Master Directory (GCMD) Service Keywords DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
Data Center keywords
Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords
Global Change Master Directory (GCMD) Platform KeywordsModels/Analyses > DEM > Digital Elevation Model
Place keywords
Global Change Master Directory (GCMD) Location Keywords Geographic Region > Global Land Geographic Region > Global Ocean
Project keywords
Global Change Master Directory (GCMD) Project Keywords ICSU-WDS > International Council for Science - World Data System NOAA OneStop Project
Use Constraints
Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Access Constraints
Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Other Constraints
Cite as: NOAA National Geophysical Data Center. 2009: ETOPO1 1 Arc-Minute Global Relief Model. NOAA National Centers for Environmental Information. Accessed [date].
Other Constraints
Also cite the NOAA Technical Memorandum: 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
In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Processor
NOAA National Centers for Environmental Information
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
NGDC Global Self-consistent, Hierarchical, High-resolution Shoreline Database (GSHHS) GSHHS - A Global Self-consistent, Hierarchical, High-resolution Shoreline Database (download)global shoreline data Description of Source: Source Contribution: global shoreline data downloaded from web site ; Source Type: online Temporal extent used: 1996-01-01 to 2003-01-01 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 Time Instant: 2006-01-01 JODC Bathymetry J-EGG500(JODC-Expert Grid data for Geographic -500m) (download)500 meter gridded bathymetry data set Description of Source: Source Contribution: 500 meter gridded bathymetry data set ; Source Type: online Time Instant: 1999-01-01 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 Time Instant: 2005-01-01 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 A high resolution spherical grid topography of the Baltic Sea 2nd edition (download)High resolution spherical grid topography of the Baltic Sea Description of Source: Source Contribution: High resolution spherical grid topography of the Baltic Sea downloaded from web site ; Source Type: online Time Instant: 2001-01-01 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 Time Instant: 2000-01-01 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 Greenland 5 km DEM, Ice Thickness, and Bedrock Elevation Grids (download)5 km elevation grid of Greenland bedrock Description of Source: Source Contribution: NSIDC 5 km elevation grid of Greenland bedrock downloaded from web site ; Source Type: online Temporal extent used: 1970-01-01 to 2001-01-01
Lineage information for: repository
Processing Steps
2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Last Modified: 2020-05-21-06:00 For questions about the information on this page, please email: ncei.info@noaa.gov
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