出典:Wikipedia
出典:『Wikipedia』 (2011/06/29 23:22 UTC 版)
An azimuth (pronounced /ˈæzɪməθ/ ( listen)) (from Arabic السمت (as‑simt), meaning "direction") is an angular measurement in a spherical coordinate system. The vector from an observer (origin) to a point of interest is projected perpendicularly onto a reference plane; the angle between the projected vector and a reference vector on the reference plane is called the azimuth.
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