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  2. Global Area Reference System - Wikipedia

    en.wikipedia.org/wiki/Global_Area_Reference_System

    The fourth and fifth characters designate a 30-minute wide latitudinal band. Beginning at the south pole and proceeding northward, the bands are lettered from AA to QZ (omitting I and O) so that 90 00’S to 89 30’S is band AA; 89 30’S to 89 00’S is band AB; and so on. Each 30-minute cell is divided into four 15-minute by 15-minute quadrants.

  3. LGM-30 Minuteman - Wikipedia

    en.wikipedia.org/wiki/LGM-30_Minuteman

    LGM-30 Minuteman. Minuteman III launch from Vandenberg Space Force Base in California on 9 February 2023. The LGM-30 Minuteman is an American land-based intercontinental ballistic missile (ICBM) in service with the Air Force Global Strike Command. As of 2024, the LGM-30G (Version 3) [note 1] is the only land-based ICBM in service in the United ...

  4. Geographic coordinate system - Wikipedia

    en.wikipedia.org/wiki/Geographic_coordinate_system

    t. e. 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 of the various spatial reference systems that are in use, and forms the basis for most others.

  5. World Geodetic System - Wikipedia

    en.wikipedia.org/wiki/World_Geodetic_System

    The WGS 84 datum surface is an oblate spheroid with equatorial radius a = 6 378 137 m at the equator and flattening f = 1 ⁄ 298.257 223 563. The refined value of the WGS 84 gravitational constant (mass of Earth's atmosphere included) is GM = 3.986 004 418 × 10 14 m 3 /s 2. The angular velocity of the Earth is defined to be ω = 72.921 15 × ...

  6. Google Maps - Wikipedia

    en.wikipedia.org/wiki/Google_Maps

    Google Maps is a web mapping platform and consumer application offered by Google. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets (Street View), real-time traffic conditions, and route planning for traveling by foot, car, bike, air (in beta) and public transportation.

  7. Web Mercator projection - Wikipedia

    en.wikipedia.org/wiki/Web_Mercator_projection

    Web Mercator, Google Web Mercator, Spherical Mercator, WGS 84 Web Mercator[1] or WGS 84/Pseudo-Mercator is a variant of the Mercator map projection and is the de facto standard for Web mapping applications. It rose to prominence when Google Maps adopted it in 2005. [2] It is used by virtually all major online map providers, including Google ...

  8. 91st Missile Wing LGM-30 Minuteman missile launch sites

    en.wikipedia.org/wiki/91st_Missile_Wing_LGM-30...

    Overview. In November 1962, the 455th Strategic Missile Wing was the fourth United States Air Force LGM-30 Minuteman ICBM wing, the third with the LGM-30B Minuteman I. In 1962 and 1963 150 missiles were deployed to silos controlled by three squadrons of 455th in North Dakota. On 25 June 1968 the 91st Bombardment Wing was reassigned to Minot AFB ...

  9. Earth ellipsoid - Wikipedia

    en.wikipedia.org/wiki/Earth_ellipsoid

    v. t. e. An Earth ellipsoid or Earth spheroid is a mathematical figure approximating the Earth's form, used as a reference frame for computations in geodesy, astronomy, and the geosciences. Various different ellipsoids have been used as approximations. It is a spheroid (an ellipsoid of revolution) whose minor axis (shorter diameter), which ...