动态-独立坐标系在复杂地形中的研究与应用

Research and Application of Dynamic-Independent Coordinate System in Complex Terrain

本文探讨了动态-独立坐标系的建立过程,阐述了其在复杂地形线路工程中的优势,并结合青海某燃气管线项目,重点分析了动态-独立坐标系中不同高度抵偿坐标系间的搭接精度及其适用范围。结果显示:(1)在复杂地形、长距离线路控制测量项目中,地势起伏对地表长度投影变形影响较大,构建“动态-独立坐标系”不仅能够满足投影变形的相关规范要求,还对后续测绘及施工提供了极其便捷的工作条件;(2)根据搭接带检测边的拼接精度分析结果,“动态-独立坐标系”中相互搭接的独立坐标系,需在同一中央子午线分带下进行解算,不同中央子午线下解算的抵偿坐标系之间禁止相互拼接。

In this paper, the establishment process of dynamic-independent coordinate system is discussed, and its advantages in complex terrain line engineering are expounded. Combined with a gas pipeline project in Qinghai Province, the overlap precision and its application range between different compensation coordinate systems with different heights in dynamic-independent coordinate system are emphatically analyzed. The results show that: First, the project of route control survey in complex terrain, long distance, the topographic fluctuation has a great influence on the projection deformation of the surface length. The construction of “dynamic-independent coordinate system” can not only meet the requirements of the relevant specifications of the projection deformation, but also provide a very convenient working condition for subsequent surveying and construction;second, the overlapping independent coordinate systems in the dynamic-independent coordinate system need to be solved under the same central meridian zoning, and the compensation coordinate systems calculated under different central meridians are prohibited from joining each other, based on the results of stitching accuracy of lap joints.