南京市域基础框架网复测的应用研究

The Repetition Measurement of the foundational control network For Nanjing

为了更好地保障南京城乡规划建设,确保基础测绘成果的准确可靠,对南京市域基础框架网进行了全面复测,主要包括高精度三维GNSS控制网复测和二等水准网复测。本文对南京市域高精度三维控制网复测的方法、技术要点及成果精度等进行了研究,完成了控制网的布设、测量、平差和精度分析,获取区域网CGCS2000坐标系成果。结果表明:南京市基础控制网的复测成果精度优良。

In order to better guarantee the urban and rural planning and construction of Nanjing and ensure the accuracy and reliability of basic surveying and mapping results,the basic framework network of Nanjing is comprehensively retested. Nanjing regional basic framework network resurvey mainly includes high-precision three-dimensional GNSS control network resurvey and second order leveling network resurvey. In this paper,the method,technical points,and results accuracy of the high-precision three-dimensional control network retest in Nanjing are studied. The layout,measurement,adjustment,and accuracy analysis of the control network are completed,and the CGCS2000 coordinate system results of the regional network are obtained. The results show that the precision of retest results of Nanjing basic control network is excellent.