A Bathymetric Map is a map that accurately depicts all of the various depths of a water body. A bathymetric map or chart usually shows floor relief or terrain as contour lines (called depth contours or isobaths), and may additionally provide surface navigational information. Color-coding to show the different depths of water is a common methodology used in bathymetric maps. This image is a Bathymetric map of Lake Tahoe CA/NV. In this image, areas where the bottom is visible are colored red and green (greater bottom reflectance is shown in red). Where the lake is blue the bottom cannot be seen. The depth to which the bottom is visible varies depending on the clarity of the water.
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