horizontal angle

基本解释

The direction to an object from a point, expressed as a horizontal angle measured clockwise from true north.
从一点到目标的方向，表示为从北开始顺时针测量的一个水平角度。
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.
在利用全站仪放样时，其精放样阶段以水平角测量与距离测量两部分操作为主。
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 .
方位角观察者通过测量所具有的水平角度，从某一参考方向顺时针测量，如从北部或从参考天体处，通常从北极星。

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