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  2. Geographic coordinate system - Wikipedia

    en.wikipedia.org/wiki/Geographic_coordinate_system

    A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude. [1] It is the simplest, oldest and most widely used type of the various spatial reference systems that are in use, and forms the basis for most others.

  3. Washington metropolitan area - Wikipedia

    en.wikipedia.org/wiki/Washington_metropolitan_area

    The Washington metropolitan area, also referred to as the D.C. area, Greater Washington, the National Capital Region, or locally as the DMV (short for District of Columbia, Maryland, and Virginia), is the metropolitan area centered around Washington, D.C., the federal capital of the United States.

  4. List of geographic centers of the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_geographic_centers...

    3 mi (4.8 km) east of Roxbury Virginia: Buckingham County: 5 mi (8.0 km) southwest of Buckingham: Washington: Chelan County: 10 mi (16 km) west-southwest of Wenatchee West Virginia: Braxton County: 4 mi (6.4 km) east of Sutton Wisconsin: Wood County: 9 mi (14 km) southeast of Marshfield

  5. Latitude - Wikipedia

    en.wikipedia.org/wiki/Latitude

    The Equator has a latitude of 0°, the North Pole has a latitude of 90° North (written 90° N or +90°), and the South Pole has a latitude of 90° South (written 90° S or −90°). The latitude of an arbitrary point is the angle between the equatorial plane and the normal to the surface at that point: the normal to the surface of the sphere ...

  6. List of U.S. states and territories by area - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    This is a complete list of all 50 U.S. states, its federal district (Washington, D.C.) and its major territories ordered by total area, land area and water area. [1] The water area includes inland waters, coastal waters, the Great Lakes and territorial waters. Glaciers and intermittent bodies of water are counted as land area. [2]

  7. Geographical distance - Wikipedia

    en.wikipedia.org/wiki/Geographical_distance

    Historically, the long-line formulae were derived in the form of expansion series with regard to flattening. [16] [17] Lambert's formulae [18] use the first-order correction and reduced latitude, = ⁡ (() ⁡), for better accuracy. They give accuracy on the order of 10 meters over thousands of kilometers.

  8. Equirectangular projection - Wikipedia

    en.wikipedia.org/wiki/Equirectangular_projection

    Equirectangular projection of the world; the standard parallel is the equator (plate carrée projection). Equirectangular projection with Tissot's indicatrix of deformation and with the standard parallels lying on the equator True-colour satellite image of Earth in equirectangular projection Height map of planet Earth at 2km per pixel, including oceanic bathymetry information, normalized as 8 ...

  9. Universal Transverse Mercator coordinate system - Wikipedia

    en.wikipedia.org/wiki/Universal_Transverse...

    The maximum "northing" value is about 9 300 000 meters at latitude 84 degrees North, the north end of the UTM zones. The southern hemisphere's northing at the equator is set at 10 000 000 meters. Northings decrease southward from these 10 000 000 meters to about 1 100 000 meters at 80 degrees South, the south end of the UTM zones.