GEBCO Map of the World Oceans

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  • Publisher: UNESCO
  • Catalogue: 10308
  • Scale: 1:35,000,000
  • Sheet Reference: 5.00
  • Size: 132x102cm
The General Bathymetric Chart of the Oceans (GEBCO) world map shows the bathymetry of the world's ocean floor in the form of a 1.3m x 1.0m map. Bathymetric tinting shows the depths and altitude tinting is applied to the land masses. No cities are indicated, but rivers are marked (not named) and many bathymetric features are named, eg. abyssal plains, fracture zones and basins. Latitude and longitude lines are at 30 degree intervals, with margin ticks ate one degree intervals. The map is on a Mercator projection at a scale of 1:35,000,000 at the Equator. Below the main map are 2 stereographic projections showing the polar regions at 1:25,000,000.

Work on the creation of the GEBCO world map began as a laboratory workshop project of the Nippon Foundation/GEBCO Training Project at the Center for Coastal and Ocean Mapping of the University of New Hampshire, USA.

The bathymetry data shown on the map is based upon the GEBCO One Minute Grid, a global bathymetric grid with one arc-minute spacing, as contained within the Centenary Edition of the GEBCO Digital Atlas (published in 2003). The land imagery is taken from the US National Aeronautics and Space Administration's (NASA) Blue Marble data set. The coastline is taken from the World Vector Shoreline.

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