GEBCO global ocean and land terrain grid

The GEBCO_2019 Grid was the first global bathymetric grid released by the General Bathymetric Chart of the Oceans (GEBCO) that had been developed through the Nippon Foundation-GEBCO Seabed 2030 Project. The GEBCO_2019 product provides global coverage, spanning 89° 59' 52.5''N, 179° 59' 52.5''W to 89° 59' 52.5''S, 179° 59' 52.5''E on a 15 arc-second grid. It consists of 43200 rows x 86400 columns, giving 3,732,480,000 data points. The data values are pixel-centre registered i.e. they refer to elevations at the centre of grid cells. The data are available to free download according to the Terms of Use provided by https://www.gebco.net/. The GEBCO_2019 Grid has been projected to WGS 84 / IBCAO Polar Stereographic (EPSG:3996) and clipped to 50° N. GEBCO Compilation Group (2021) GEBCO 2021 Grid (doi:10.5285/c6612cbe-50b3-0cff-e053-6c86abc09f8f). Map cartography and styling compiled by Christian Brogaard Pedersen (cbp@geus.dk), Geological Survey of Denmark and Greenland (GEUS).  Disclaimer: The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea. The GEBCO Grid is made available 'as is'. While every effort has been made to ensure reliability within the limits of present knowledge, the accuracy and completeness of The GEBCO Grid cannot be guaranteed. No responsibility can be accepted by GEBCO, IHO, IOC, or those involved in its creation or publication for any consequential loss, injury or damage arising from its use or for determining the fitness of The GEBCO Grid for any particular use. The GEBCO Grid is based on bathymetric data from many different sources of varying quality and coverage. As The GEBCO Grid is an information product created by interpolation of measured data, the resolution of The GEBCO Grid may be significantly different to that of the resolution of the underlying measured data. Purpose The purpose of the dataset is to serve as a common bathymetric background map in the ISAAFFIK Arctic Gateway portal and to support visualisation and contextualisation of marine, geological and geophysical datasets in Arctic regions. Supplemental Information The dataset is based on GEBCO 2019 and must not be used for navigation purposes. The dataset has been created as a background map for the ISAAFFIK Arctic Gateway and is published as a Web Map Tile Service (WMTS) via GEUS’ ArcGIS Server. GEUS has only carried out a reprojection and publication of the original dataset. Lineage The GEBCO_2019 Grid is released by the General Bathymetric Chart of the Oceans (GEBCO) and has been developed through the Nippon Foundation-GEBCO Seabed 2030 Project with all rights reserved. The Seabed 2030 Project aims to bring together all available bathymetric data to produce the definitive map of the world ocean floor and make it available to all. The GEBCO_2019 product provides global coverage with a continuous, global terrain model for ocean and land with a spatial resolution of 15 arc-seconds grid. It consists of 86400 rows x 43200 columns, giving 3,732,480,000 data points. The data values are pixel-center registered i.e. they refer to elevations at the center of grid cells. The grid uses as a ‘base’ Version 1 of the SRTM15+ data set (Olson et al, 2014). This data set is a fusion of land topography with measured and estimated seafloor topography. It is largely based on version 11 of SRTM30+ (Becker et al, 2009; Sandwell et al, 2014), augmented with the gridded bathymetric data sets developed by the four Seabed 2030 Regional Centers. The published data were recalculated on a cell-registered grid for use by GEBCO. The majority of the work, for the non-polar regions, was done using the 'remove-restore' procedure (Smith and Sandwell, 1997; Becker, Sandwell and Smith, 2009 and Hell and Jakobsson, 2011). This is a two-stage process of computing the difference between the new data and the 'base' grid, gridding the difference and adding this difference back to the existing base grid. The aim is to achieve a smooth transition between the 'new' and 'base' data sets with the minimum of perturbation of the existing base data set. For the polar data sets, and the adjoining North Sea, are supplied in the form of complete grids. These data sets were included using feather blending techniques from GlobalMapper software version 11.01, made available by Blue Marble Geographic.

This Collection provides Copernicus DEM COG products, which represent the surface of the Earth including buildings, infrastructure and vegetation, in resolution of 30 meters.

This Collection provides Copernicus DEM COG products, which represent the surface of the Earth including buildings, infrastructure and vegetation, in resolution of 90 meters.

Retirement Notice: This item is in mature support as of December 2025 and will be retired in December 2027. A new version of this item is available for your use. Esri recommends updating your maps and apps to use the new version. Ocean depth plays an important role in the distribution and abundance of living organisms and has important implications for shipping and offshore development projects such as wind power and oil extraction. Phenomenon Mapped: Seafloor depth, bathymetryUnits: Meters below sea levelCell Size: 30 arc seconds, approximately 1 kmSource Type: DiscretePixel Type: Signed integerSpatial Reference: GCS_WGS_1984Mosaic Projection: Web Mercator Auxiliary SphereExtent: Global oceansSource: Marine Conservation Institute (MCI)Citation: Becker JJ, Sandwell DT, Smith WHF, Braud J, Binder B, et al. (2009) Global bathymetry and elevation data at 30 arc seconds resolution: SRTM30_PLUS. Marine Geodesy 32: 355–371.Publication Date: 2009ArcGIS Server URL: https://gis.earthdata.nasa.gov/portal/sharing/servers/3e20c8ae23b44ca7b99af621fdc129de/ The Marine Conservation Institute used this dataset as an input to a predictive habitat model documented in the publication Global Habitat Suitability for Framework-Forming Cold-Water Corals.  The source data is available from the Scripps Institution of Oceanography Satellite Geodesy Webpage. What can you do with this layer?  Visualization: This layer can be used for visualization online in web maps and in ArcGIS Desktop.  Analysis: This layer can be used as an input to geoprocessing tools and model builder.  Raster Functions: Unit Conversion – meters to feet, Cartographic Renderer, Aspect, Slope, and Hillshade - see this blog for more information.

Denmark's Height Model - Terrain (DHM/Terrain) is a digital model that describes the height of the terrain in relation to the average sea level. Objects that are located above ground, including trees, houses, cars, and more have been removed. DHM/Terrain and shadow maps are suitable for planning, design and landscape analysis. Data is part of Denmark's Height Model (DHM).

Europe - Height model Terrain is a digital height model over Europe. The height model includes definitions of terrain heights, and is part of Open Maps for Europe, which offers free map solutions from more than 40 European countries.