GPS在胶南市地理信息工程中的应用

APPLICATION OF GPS TO JIAONAN CITY GIS ENGINEERING

阐述了胶南市GIS工程中应用GPS建立三等平面控制网及高程拟合作业过程中为提高平面精度和高程拟合精度所采用的数据处理方法和达到的精度情况 ,提出了对平面网的起算点进行精度检测和保留三维无约束平差中精度较低的短基线的观点 ;在高程拟合中 ,提倡采用多种拟合方案对已知GPS水准点进行各种精度检验 ,同时对所求点的拟合高程进行精度检验 ,以多种拟合方案计算出的所求点拟合高程的均值作为最或然高程 ,计算每种拟合方案的所求点拟合高程中误差及拟合高程与最或然高程的最小差值和最大差值 ,综合考虑所有精度检验结果 。

This paper introduces the ways to promote the horizontal precision and elevation simulating and conforming precision in Jiaonan city GIS engineering. When the elevation simulating and conforming is being carried out, the precision checking for known GPS level point data will be finished in several simulating and conforming plans, and the precision checking for simulating and conforming elevation of unknown points will be implemented.