azimuthal equidistant projection
A map projection of the earth designed so that a straight line from the central point on the map to any other point gives the shortest distance between the two points.
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Azimuthal equidistant projection — The azimuthal equidistant projection is a particular map projection.A useful application for this type of projection is a polar projection in which all distances measured from the center of the map along any longitudinal line are accurate; an… … Wikipedia