azimuthal Definition

an arc of the horizon measured between a fixed point (such as true north) and the vertical circle passing through the center of an object usually in astronomy and navigation clockwise from the north point through 360 degrees

horizontal direction expressed as the angular distance between the direction of a fixed point (such as the observer's heading) and the direction of the object

a map projection of the surface of the earth so centered at any given point that a straight line radiating from the center to any other point represents the shortest distance and can be measured to scale