d3.geoTwoPointAzimuthal(point0, point1)
d3.geoTwoPointAzimuthalRaw(d)
The two-point azimuthal projection “shows correct azimuths (but not distances) from either of two points to any other point. [It can] be used to locate a ship at sea, given the exact location of two radio transmitters and the direction of the ship to the transmitters.” This projection does not support projection.rotate, as the rotation is fixed by the two given points.
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