平面α角坐标系及其应用的几个问题探讨

DISCUSSION ON SOME PROBLEMS CONCERNING PLANE α—ANGLE COORDINATE SYSTEM AND ITS APPLICATION

本文首先指出《解放军测绘学院学报》1991年第4期“平面α角坐标系及其应用”一文存在的问题,推导了不同平面α角坐标系转换的通用公式,给出了坐标增量、方位角及两直线夹角等参数在平面α角坐标系中的表示形式;重新分析了数字坐标仪X轴与Y轴不正交对方位角的影响,还通过一实例说明平面α角坐标系及其公式在实践中的应用。

Different ideas are raised and discussed on the viewpoints mentioned in the article 'Plane α-angle Coordinate System and Its Application' in 《Journal of Institute of Surveying and Mapping of PLA》 No.4 of 1991. A general formula for coordinate transformation between two different plane α-angle Coordinate Systems is derived. The expression forms of parameters such as coordinate increments, azimuth and an angle of intersection of two straight lines in plane α-angle System are also given, and the effect on azimuthal angle, because of Digital Coordinate Instrument's X-axis and Yaxis being not rectomgular, is analyzed again. At last, a simple example is attached to show the application of plane α angle coordinate system and its formulae in practice.