张辛, 杨爱明, 许其凤, 姜本海. 滇中引水工程独立坐标系统建立的关键技术研究[J]. 武汉大学学报 ( 信息科学版), 2014, 39(9): 1047-1051. DOI: 10.13203/j.whugis20130502
引用本文: 张辛, 杨爱明, 许其凤, 姜本海. 滇中引水工程独立坐标系统建立的关键技术研究[J]. 武汉大学学报 ( 信息科学版), 2014, 39(9): 1047-1051. DOI: 10.13203/j.whugis20130502
ZHANG Xin, YANG Aiming, XU Qifeng, JIANG Benhai. Key Technology on Establishment of an Independent CoordinateSystem for Water Diversion Project in Central Yunnan[J]. Geomatics and Information Science of Wuhan University, 2014, 39(9): 1047-1051. DOI: 10.13203/j.whugis20130502
Citation: ZHANG Xin, YANG Aiming, XU Qifeng, JIANG Benhai. Key Technology on Establishment of an Independent CoordinateSystem for Water Diversion Project in Central Yunnan[J]. Geomatics and Information Science of Wuhan University, 2014, 39(9): 1047-1051. DOI: 10.13203/j.whugis20130502

滇中引水工程独立坐标系统建立的关键技术研究

Key Technology on Establishment of an Independent CoordinateSystem for Water Diversion Project in Central Yunnan

  • 摘要: 目的 云南滇中引水工程具有测区跨度长、平均海拔高、高差变化大等特点,独立坐标系统的建立难度大。本文根据投影变形理论,结合滇中引水工程的特点,提出了适用性的建立独立坐标系统的关键技术解决方案。用1°带的分带方式替代常规的国家3°带分带,有效地控制工程的高斯投影变形;推导了新的适用于高原长距离工程的抵偿投影面求取方法,并结合滇中引水工程实际给出了优化的抵偿投影面设置方案。使用本文建议的独立坐标系统,工程综合变形的最大值能得到最优控制。

     

    Abstract: Objective A water diversion project in Central Yunnan exhibited several typical characteristics of theoverall survey region,such as the extraordinarily long span,the high average altitude,and large ele-vation changes.Therefore,difficult to build independent coordinate system for this project.Based onthe theory of projection distortion,we propose a key technology solutions composed of two parts.First,using the 1°projection zone to replace the regular 3°projection zone,Gauss projection distor-tion was effectively controlled.Second,a method for selecting a compensation projection plane wasdeducted to satisfy the needs of this water diversion project.An optimized solution for this project wasfound using the proposed independent coordinate system and efficiently controlled,the maximum com-prehensive deformation for this water diversion project in Central Yunnan.

     

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