Bathymetric maps use contour lines to create detailed topographic images of the sea floor.The end result of this process is to be able to clearly depict the size, shape, location, and density of underwater features. The bathymetric map is a key resource tool in the development of energy and marine resources. The bathymetric map above was the first of its kind to map a realistic ocean basin. The surveys taken to develop this bathymetric map were done in the late 1800s in the Gulf of Mexico. You can tell by the range of colors that the darker the blue is on the map the deeper the ocean is in real life.
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