GNSS工程控制网坐标系挂靠问题探讨

Discussion on GNSS engineering control network coordinate system anchoring

分析了工程测绘中出现投影变形的原因及消除投影变形的常用方法。论述了挂靠坐标系的建立方法和应用条件,挂靠坐标系既能有效抵偿基线投影变形,又能解决两种坐标系统的衔接问题,为控制网计算、地形图测绘、工程图与万分图拼接、施工测绘提供了极大的便利。

Analysis was made on the causes for projection distortion of engineering survey as well as the frequently-used solution, based on which the author discussed the setting up method and application conditions of anchored co-ordinate system which not only renders effective compensation of baseline projection distortion, but also permits linking of links up two coordinate systems, so as to provide great convenience for control network calculation, topo-graphic mapping, joining up of engineering drawings with 1/10000 topographic map, construction surveying.