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  2. Cardinal direction - Wikipedia

    en.wikipedia.org/wiki/Cardinal_direction

    The four cardinal directions, or cardinal points, are the four main compass directions: north, south, east, and west, commonly denoted by their initials N, S, E, and W respectively. Relative to north, the directions east, south, and west are at 90 degree intervals in the clockwise direction. The ordinal directions (also called the intercardinal ...

  3. Cardinal point (optics) - Wikipedia

    en.wikipedia.org/wiki/Cardinal_point_(optics)

    Cardinal point (optics) In Gaussian optics, the cardinal points consist of three pairs of points located on the optical axis of a rotationally symmetric, focal, optical system. These are the focal points, the principal points, and the nodal points; there are two of each. [1] For ideal systems, the basic imaging properties such as image size ...

  4. Points of the compass - Wikipedia

    en.wikipedia.org/wiki/Points_of_the_compass

    32-point compass rose. The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography.A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each separated by 90 degrees, and secondarily divided by four ordinal (intercardinal) directions—northeast, southeast, southwest, and ...

  5. Classical compass winds - Wikipedia

    en.wikipedia.org/wiki/Classical_compass_winds

    Classical compass winds. The Tower of the Winds in Athens, partly reconstructed, in 1762. In the ancient Mediterranean world, the classical compass winds were names for the points of geographic direction and orientation, in association with the winds as conceived of by the ancient Greeks and Romans. Ancient wind roses typically had twelve winds ...

  6. Compass - Wikipedia

    en.wikipedia.org/wiki/Compass

    Compass. A modern military compass, with included sight device for aligning. A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.

  7. Compass rose - Wikipedia

    en.wikipedia.org/wiki/Compass_rose

    Compass rose with the eight principal winds. A compass rose, sometimes called a wind rose, rose of the winds or compass star, is a figure on a compass, map, nautical chart, or monument used to display the orientation of the cardinal directions (north, east, south, and west) and their intermediate points. It is also the term for the graduated ...

  8. History of the compass - Wikipedia

    en.wikipedia.org/wiki/History_of_the_compass

    The compass is a magnetometer used for navigation and orientation that shows direction in regards to the geographic cardinal points. The structure of a compass consists of the compass rose, which displays the four main directions on it: East (E), South (S), West (W) and North (N). The angle increases in the clockwise position.

  9. Watchtower (magic) - Wikipedia

    en.wikipedia.org/wiki/Watchtower_(magic)

    Watchtower (magic) A watchtower or guardian in ceremonial magical tradition is a tutelary spirit of one of the four cardinal points or quarters (East, South, West and North). In many magical traditions, they are understood to be Enochian angels or the Archangels Uriel, Raphael, Michael, and Gabriel. They are also variously associated in other ...