摘要
控制测量在数据处理时,通常要进行两次投影(地面→参考椭球面→高斯投影平面),也相应地产生两次投影变形,不利于大比例尺测图和工程施工放样。为了控制投影变形的影响,必须对观测结果进行改正计算。本文针对这一问题,通过选择适当的坐标系统,可以有效地消除或减弱投影变形,以满足工程的实际需要.
When processing data in controlling survey, we usually project twice (land surface→according to ellipsoid plane→gauss projection plane)and it brings about Deformed projection twice too. It is not good for large scale mapping and setting-out of project construction. To decrease the influence of deformed projection, the surveying result must be computed correctly. This paper introduces the method of choosing the suitable coordinate system and efficiently decreasing the deformed projection,which fits for the practical need of engineering.
出处
《石家庄铁路职业技术学院学报》
2005年第B06期30-34,共5页
Journal of Shijiazhuang Institute of Railway Technology
关键词
投影变形
坐标系统
合理选择
deformed projection coordinate system properly choosing
