![]() Earlier this year, NOAA and the IHO signed a Memorandum of Understanding reaffirming NCEI as the host of the Data Center for Digital Bathymetry. The viewer also shows the spatial extent of data archived at other repositories such as the European Marine Observation and Data Network (EMODnet) via web services. ![]() ![]() Discovery and access to these data holdings can be found using the IHO Bathymetric Data Viewer. NCEI hosts the International Hydrographic Organization (IHO) Data Centre for Digital Bathymetry. NCEI is working with global partners to achieve national and international ocean mapping goals. While we are learning more about the ocean floor all the time, we still know less about it than we do about the surfaces of Mars or the moon. National Ocean Service Hydrographic Survey Dataīathymetric data provides valuable insights into the underwater world and helps in making informed decisions regarding the sustainable use and protection of our shared marine resources.NCEI manages the United States national archive for bathymetric data and holds bathymetric surveys received from sources worldwide. Bathymetric data, collected from a variety of methods, can be used to create bathymetric maps depicting variations in the sea-floor using color and contour lines called depth contours or isobaths. We now know that beneath the sea surface is an underwater world that contains mountain ranges, trenches, and plains.īathymetry refers to the study of the underwater depths of water bodies, including the ocean, rivers, and lakes. But until the 1800s, what lay below the surface of the ocean was still mostly unknown. They began to make maps of the new lands they discovered and, over time, those maps became more precise. When humans first began to sail the ocean, they did so without having any idea of what they might find.
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