线状工程测量控制网起算点精度对基线解算的影响研究  

Study on Influence of Starting Point Accuracy for Linear Engineering Measurement Control Network Baseline Solution

作　　者：谷玉全 GU Yuquan(Jiangsu Geologic Surveying and Mapping Institute,Nanjing 211102,China)

机构地区：[1]江苏省地质测绘院

出　　处：《测绘与空间地理信息》2019年第11期118-120,共3页Geomatics & Spatial Information Technology

基　　金：江苏省地质矿产勘查局科研项目(2016-KY-03)资助

摘　　要：针对长距离大型线状工程控制网使用的起算点坐标精度对基线解算结果的影响问题,本文以康定至泸定境内500 KV输变电工程测量控制网作为研究对象,用试验的方法讨论了起算点坐标含有2 cm、10 cm、20 cm、2 m误差时对控制网基线解算的影响。结果表明:当起算点坐标误差控制在10 cm范围内时,线状控制网GAMIT基线解算结果精度较高、结果较为可靠;当起算点初始坐标精度低至20 cm时,GAMIT软件解算的线状控制网基线在X、Y、Z 3个方向的分量可仍保持在mm级;但当起算点坐标误差达到2 m时,线状控制网GAMIT基线解算结果不再可靠,无法满足线状控制网高精度基线解算的要求。For the influence of the starting point coordinate precision of the long-distance large-scale linear engineering control network on the baseline solution results,the 500 KV transmission and transformation engineering measurement control network in Kangding to Luding is taken as the research object,and the starting point is discussed by the experimental method.The influence of the coordinates of 2 cm,10 cm,20 cm,2 m on the baseline calculation of the control network.The results show that when the coordinate error of the starting point is controlled within 10 cm,the baseline calculation result of the linear control network GAMIT is higher and the result is more reliable.When the initial coordinate precision of the starting point is as low as 20 cm,the line is solved by GAMIT software.The components of the control network baseline in the X,Y,and Z directions can still remain at the mm level;however,when the coordinate error of the starting point reaches 2 m,the baseline calculation result of the linear control network GAMIT is no longer reliable,and the linear control network cannot be satisfied.High-precision baseline solution requirements.

关 键 词：线状工程 测量控制网 起算点精度 GAMIT软件 基线解算 

分 类 号：P258[天文地球—测绘科学与技术]