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  2. Bathymetric chart - Wikipedia

    en.wikipedia.org/wiki/Bathymetric_chart

    Topographic maps display elevation above ground and are complementary to bathymetric charts. Bathymetric charts showcase depth using a series of lines and points at equal intervals, called depth contours or isobaths (a type of contour line). A closed shape with increasingly smaller shapes inside of it can indicate an ocean trench or a seamount ...

  3. Bathymetry - Wikipedia

    en.wikipedia.org/wiki/Bathymetry

    Global relief modelModel of Earth's relief including elevation and depth underwater; Hydrographic survey – Science of measurement and description of features which affect maritime activities; Ocean surface topography – Shape of the ocean surface relative to the geoid; Seabed – Bottom of the ocean Seabed 2030 Project

  4. Bathymetric attributed grid - Wikipedia

    en.wikipedia.org/wiki/Bathymetric_Attributed_Grid

    Bathymetric Attributed Grid (BAG) is a file format designed to store and exchange bathymetric data.. The implementation of the format was triggered by the large adoption of gridded bathymetry and the need of transferring the required information about bathymetry and associated uncertainty (i.e., metadata) between processing applications.

  5. Global relief model - Wikipedia

    en.wikipedia.org/wiki/Global_Relief_Model

    A global relief model, sometimes also denoted as global topography model or composite model, combines digital elevation model (DEM) data over land with digital bathymetry model (DBM) data over water-covered areas (oceans, lakes) to describe Earth's relief. A relief model thus shows how Earth's surface would look like in the absence of water or ...

  6. National Geodetic Vertical Datum of 1929 - Wikipedia

    en.wikipedia.org/wiki/National_Geodetic_Vertical...

    Since the Sea Level Datum of 1929 was a hybrid model, it was not a pure model of mean sea level, the geoid, or any other equipotential surface. Therefore, it was renamed the National Geodetic Vertical Datum of 1929 (NGVD 29) May 10, 1973, by the National Geodetic Survey , a part of the National Oceanic and Atmospheric Administration .

  7. Office of Coast Survey - Wikipedia

    en.wikipedia.org/wiki/Office_of_Coast_Survey

    Responsible for updating nautical charts, surveying the seafloor, responding to maritime emergencies, and searching for underwater obstructions that pose a danger to navigation, the Office of Coast Survey provides the United States with navigation products and information for improving commerce and security and for protecting coastal environments. [1]

  8. United States Coast Pilot - Wikipedia

    en.wikipedia.org/wiki/United_States_Coast_Pilot

    The Coast Survey, known from 1878 as the United States Coast and Geodetic Survey, continued to publish the Coast Pilot until it merged with other U.S. Government agencies to form the National Oceanic and Atmospheric Administration (NOAA) on 3 October 1970. The Office of Coast Survey in NOAA ' s National Ocean Service has published them since then.

  9. U.S. National Geodetic Survey - Wikipedia

    en.wikipedia.org/wiki/U.S._National_Geodetic_Survey

    The National Geodetic Survey is an office of NOAA's National Ocean Service.Its core function is to maintain the National Spatial Reference System (NSRS), "a consistent coordinate system that defines latitude, longitude, height, scale, gravity, and orientation throughout the United States". [1]