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  2. Great-circle navigation - Wikipedia

    en.wikipedia.org/wiki/Great-circle_navigation

    Great-circle navigation or orthodromic navigation (related to orthodromic course; from Ancient Greek ορθός (orthós) 'right angle' and δρόμος (drómos) 'path') is the practice of navigating a vessel (a ship or aircraft) along a great circle.

  3. Mercator projection - Wikipedia

    en.wikipedia.org/wiki/Mercator_projection

    The distinction between rhumb (sailing) distance and great circle (true) distance was clearly understood by Mercator. (See Legend 12 on the 1569 map.) He stressed that the rhumb line distance is an acceptable approximation for true great circle distance for courses of short or moderate distance, particularly at lower latitudes.

  4. Great Circle (novel) - Wikipedia

    en.wikipedia.org/wiki/Great_Circle_(novel)

    Great Circle is a 2021 novel by American writer Maggie Shipstead, published on May 4, 2021, by Alfred A. Knopf. [1] ... a travelling trader and map-maker; ...

  5. Azimuthal equidistant projection - Wikipedia

    en.wikipedia.org/wiki/Azimuthal_equidistant...

    The azimuthal equidistant projection is an azimuthal map projection. It has the useful properties that all points on the map are at proportionally correct distances from the center point, and that all points on the map are at the correct azimuth (direction) from the center point. A useful application for this type of projection is a polar ...

  6. Map projection - Wikipedia

    en.wikipedia.org/wiki/Map_projection

    When making a conic map, the map maker arbitrarily picks two standard parallels. Those standard parallels may be visualized as secant lines where the cone intersects the globe—or, if the map maker chooses the same parallel twice, as the tangent line where the cone is tangent to the globe. The resulting conic map has low distortion in scale ...

  7. Great Loop - Wikipedia

    en.wikipedia.org/wiki/Great_Loop

    The Great Loop is a system of waterways that encompasses the eastern portion of the United States and part of Canada. It is made up of both natural and man-made waterways, including the Atlantic and Gulf Intracoastal Waterways , the Great Lakes , the Erie Canal , and the Mississippi and Tennessee-Tombigbee Waterway . [ 1 ]