高原地方坐标系的理论设计与投影变形检验  

Design of traditional local coordinate system and examination of projection deformation

作　　者：李文华[1] 李寻[2] 

机构地区：[1]云南省基础地理信息中心,昆明650034 [2]新南威尔士大学

出　　处：《测绘科学》2015年第10期79-83,共5页Science of Surveying and Mapping

摘　　要：随着城市扩张及城乡一体化统筹管理,传统方法设计的地方坐标已不能适应城市发展的需要。针对这一问题,该文应用高斯投影、抵偿高程面相结合的方法,详细讨论了不同中央子午线及抵偿高程面下坐标系的适宜范围及变形情况,并提出高程投影带概念,计算给出各带参数速查表。通过一个实例、应用多高程投影带方法,将坐标系适宜宽度由传统方法的±45km扩展到±165km以上。该文还提出一种应用DEM检验坐标系投影变形的新方法,达到了遍历、直观的检验效果。目前国家正在推广CGCS2000及开展数字城市建设,均需要设计新的地方坐标系,可供参考使用,但海拔低于159m的区域效果不很明显。Due to the urban expansion and the jurisdiction of the regional integration of urban and rural areas, traditional local coordinate system design method is not able to satisfy the requirements of urban de- velopment. This study leveraged the Gauss projection in conjunction with the compensating level surface to evaluate the feasible ranges and deformations corresponding to different central meridians and compensa- ting level surface. This evaluation produced the concept of elevation projection zones and the parameter ta- ble for each zone was provided. This paper implemented the multiple projection zones on a case study and extended the feasible range for local coordinate system from ±45km to±165km. Finally, based on DEM, a spread all over and explicit examination method for coordinate system deformation was developed. Currently, China is promoting CGCS 2000 and constructing digital cities, which requires new local coordinate systems. The approaches proposed in this paper could be applied to the design of these new local coordinate systems but the effects was not obvious for lower altitudes （〈159m）.

关 键 词：地方坐标系 抵偿高程面 高斯投影带 高程投影带 变形检验 

分 类 号：P208[天文地球—地图制图学与地理信息工程]