独立坐标系椭球变换与坐标换算  

Independent coordinate system ellipsoid transformation and coordinate conversion

作　　者：陈再辉 CHEN Zaihui(Lishui Construction Technology Management Center,Lishui,Zhejiang 323000,China)

机构地区：[1]丽水市建设技术管理中心,浙江丽水323000

出　　处：《导航定位学报》2022年第2期170-175,共6页Journal of Navigation and Positioning

摘　　要：独立坐标系的建立,通常使用椭球的平移、膨胀、变形三种变换方式。针对椭球变换使用大地坐标微分公式直接计算大地坐标变化量,直接算法涉及大量的大地坐标变化的公式推导和角度运算,提出了标准坐标系与独立坐标系的间接换算方法,间接方法可有效避免大地坐标增量的计算。通过具体的实例对椭球变换的三种方式进行比较,验证了间接方法的有效性、实用性和便捷性。For the establishment of an independent coordinate system, three transformation methods of translation, expansion and deformation of an ellipsoid are generally used. When performing ellipsoidal transformation, the geodetic coordinate differential formula is usually used to directly calculate the geodetic coordinate change. The direct algorithm involves a large number of geodetic coordinate formula derivations and angle calculations. This paper proposes an indirect conversion method between the standard coordinate system and the independent coordinate system. The indirect method can effectively avoid the calculation of the geodetic coordinate increment. The three methods of ellipsoid transformation are compared through specific examples, and the effectiveness, practicability and convenience of the indirect method are verified.

关 键 词：椭球变换 独立坐标 坐标换算 平均高程面 

分 类 号：P228[天文地球—大地测量学与测量工程]