GPS测量在怀远县城镇地籍控制测量中的应用与精度分析

以怀远县城镇地籍调查与测量工程中的D、E级GPS测量为背景，根据测区的特点、已知点的情况及作业依据等基本情况，确定布网方案及布网原则，介绍了GPS测量所使用的仪器和观测过程中应注意的事项以及解算过程，重点对GPS控制网平差计算过程中所涉及的基线处理、三维无约束平差以及二维约束平差后的精度进行统计，对其精度进行分析，并用全站仪对部分GPS点进行测距，使用改正后的两点间边长与坐标反算边长进行比较，同时以常规的定向方法检测另一GPS点的坐标并与原坐标进行比较，证明GPS点的可靠性，以供测绘人员参考和借鉴。

GPS Measurements in Huaiyuan County Cadastral Control Survey and Accuracy Analysis

Based on Huaiyuan county cadastral survey and D, E -class GPS measurements and the characteristics of the surveyed area, known spots and operating basis etc, options and fabric mesh principle are identified. The notes in GPS measurement and observation instruments used in the process, and the process of solution are introduced. The introduction is focused on the calculation of the baseline treatment, and the statistics of the accuracy after three - dimensional non -binding constraint adjustment and two -dimensional binding constraint adjustment. The accuracy is analyzed and some GPS points are investigated with Total Station GPS. Then the corrected coordinates of the side are compared with the inverse side between two points and the directional GPS point in the conventional method of detecting is compared with the original coordinates. To achieve the reliability of GPS points, reference for surveying and mapping personnel are provided.