基于CGCS2000的苏州平面坐标系建立

Establishment of Suzhou Plane Coordinate System Based on CGCS2000

苏州市及其各区(市)均建立了基于克拉索夫斯基椭球的城市平面坐标系,在国家全面推广使用CGCS2000和苏州市域一体化建设的背景下,亟需建立CGCS2000椭球下全市统一的坐标系。通过分析CGCS2000(国家标准3°带高斯投影)和现行苏州城市平面坐标系在苏州地区的适宜性后,研究了结合苏州市地理位置和地形地貌特征,以“中央子午线和参考椭球面为最佳选取”的坐标系建立综合比选方案。在此基础上,建立了苏州2000坐标系,并实现了将CGCS2000引入苏州以及现行苏州城市平面坐标系与CGCS2000的联系,可为国内建立基于CGCS2000的城市相对独立平面坐标系提供参考。

Suzhou and its districts(cities)have established the urban plane coordinate system based on Krasovsky ellipsoid.Against the background of comprehensive promotion and use of CGCS2000 in China and the urban integration construction in Suzhou,it’s urgent to establish a coordinate system used by the whole city under the CGCS2000 ellipsoid.Firstly,we analyzed the suitability of CGCS2000(Gauss projection of national standard 3°)and the existing Suzhou urban plane coordinate system.Then,combined with the geographical location and topographic characteristics of Suzhou,we established a comprehensive comparison scheme with the coordinate system of“central meridian and reference ellipsoid as the best selection”.Finally,we established the Suzhou 2000 coordinate system,and introduced CGCS2000 into the existing Suzhou coordinate system to realize their relations,providing a reference for the establishment of urban coordinate system based on CGCS2000 in China.