摘要
GPS测量得到的是WGS-84的地心空间直角坐标,而工程中通常使用地方独立坐标系。两者的转换方法一般分为平面转换模型和空间转换模型。平面转换模型原理简单,数值稳定可靠,但只适用于小范围的CPS测量;空间转换模型可用于大范围的CPS测量,按实际情况又分为七参数转换和三参数转换两种。对这两种转换模型进行介绍。
What GPS measured is the geocentric rectangular coordinate of WGS - 84, while local independent coordinate system is usually used in engineering. The converting methods between them can be divided into plane transformation model and the spacial transformation model. The principle of plane transformation model is simple, and its numerical value is stable and reliable, but it is only applied to CPS measurement in small area;Spacial transformation model can be applied to CPS measurement in large area, which also can be further divided into seven -parameter transformation and three -parameter transformation according to practical situation. The two transfor- mation models are introduced.
出处
《北方交通》
2012年第8期36-37,共2页
Northern Communications
关键词
坐标系
GPS
平面转换
空间转换
Coordinate system
GPS
Plane transformation
Spacial transformation
