horizontal angle

基本解釋

The direction to an object from a point, expressed as a horizontal angle measured clockwise from true north.
從一點到目標的方向，表示為從北開始順時針測量的一個水平角度。
Horizontal angle survey and distance measurement are operated mainly in the stage of the pure layout when the total station is used in the layout survey.
在利用全站儀放樣時，其精放樣階段以水平角測量與距離測量兩部分操作為主。
The horizontal angle of the observer's bearing in surveying, measured clockwise from a referent direction, as from the north, or from a referent celestial body, usually Polaris .
方位角觀察者通過測量所具有的水平角度，從某一參考方向順時針測量，如從北部或從參考天體處，通常從北極星。

Tim Probert, president of global business lines, says that horizontal drilling, a process in which a well is drilled down vertically and then angled around a curve to reach reservoirs from a horizontal angle that increases the well's exposure, is now 55% of Halliburton's total activity.
FORBES
Furthermore, we have achieved a wide horizontal viewing angle of 45 degrees by incorporating an optical lens that thoroughly suppresses unwanted elements such as aberration and distortion.
ENGADGET: Sony's head-mounted 3D visor is real, HMZ-T1 arrives in Japan November 11th
Unfortunately, tragedy can strike with as simple an act as brushing one's elbow across the table, and that's all it took for me to knock my smartphone right onto a hard surface -- facedown in a perfectly horizontal position (the worst imaginable angle).
ENGADGET