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Great Slave Lake [1] [a] is the second-largest lake in the Northwest Territories of Canada (after Great Bear Lake), the deepest lake in North America at 614 m (2,014 ft), [2] and the tenth-largest lake in the world by area.
The volume of a lake is a difficult quantity to measure. [1] Generally, the volume must be inferred from bathymetric data by integration. Lake volumes can also change dramatically over time and during the year, especially for salt lakes in arid climates.
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Bathymetric surveys and charts are associated with the science of oceanography, particularly marine geology, and underwater engineering or other specialized purposes. Bathymetric map of Medicine Lake, California Bathymetric data used to produce charts can also be converted to bathymetric profiles which are vertical sections through a feature.
A reliable volume figure requires a bathymetric survey. [9] Therefore, mean depth figures are not available for many deep lakes in remote locations. [9] The average lake on Earth has the mean depth 41.8 meters (137.14 feet) [9]
Largest lake entirely within Canada, [29] and the largest lake partially within the Arctic Circle 7: Malawi Malawi Mozambique Tanzania: Fresh 29,500 km 2 11,400 sq mi 579 km 360 mi 706 m 2,316 ft 8,640 km 3 2,070 cu mi Has more species of fish than any other lake in the world. [21] 8: Great Slave Lake Canada: Fresh 27,200 km 2 10,500 sq mi 480 km
A bathymetric chart is a type of isarithmic map that depicts the submerged bathymetry and physiographic features of ocean and sea bottoms. [1] Their primary purpose is to provide detailed depth contours of ocean topography as well as provide the size, shape and distribution of underwater features.
The General Bathymetric Chart of the Oceans (GEBCO) is a publicly available bathymetric chart of the world's oceans. The project was conceived with the aim of preparing a global series of charts showing the general shape of the seafloor. Over the years it has become a reference map of the bathymetry of the world's oceans for scientists and others.