线倾向：它是直线水平投影的方向，自正北顺时针度量。
Trend is the direction of the horizontal projection of a line, measured clockwise from north.
算法采用基于视角的误差度量方法，将静态误差在屏幕上的投影转换为该误差相对于视点的夹角。
By using view Angle based error metrics, it transformed the screen projection of static error into the view Angle with respect to the viewpoint.
线倾向：它是直线水平投影的方向，自正北顺时针度量。
Trend is the direction of the horizont al projection of a line , me a sured clockwise from north.
由于在工程图学中，用正投影法解决画法几何中的某些度量和定位问题往往很不方便。
In engineering drawing, it is always inconvenient for orthographic projection to solve some measurement and orientation problems.
由于在工程图学中，用正投影法解决画法几何中的某些度量和定位问题往往很不方便。
In engineering drawing, it is always inconvenient for orthographic projection to solve some measurement and orientation problems.
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