Global relief model
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A global relief model, sometimes also denoted as global topography model or composite model, combines digital elevation model data over land with digital bathymetry model data over water-covered areas
Four different topography layers of the Earth2014 model. Clockwise from top left: (1) Earth's surface, (2) bedrock, (3) rock-equivalent topography, (4) bathymetry and ice surface
Bathymetry
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Bathymetry is the study of underwater depth of ocean floors, river floors, or lake floors. In other words, bathymetry is the underwater equivalent to hypsometry or topography. The first recorded evide
The seafloor topography near the Puerto Rico Trench
Bathymetric chart of Bear Lake