数字摄影测量产品的几何精度分析

Analysis of Geometric Accuracy on Digital Photography Product

针对“利用全数字化摄影测量系统测制(1∶10000)数字线划地图”的几何精度进行了有益的探讨,从而为“利用全数字化摄影测量系统测制(1∶10000)数字线划地图”的规模化生产提供坚实的理论基础.实验选择了包含平地、丘陵地、山地等不同地形类别;并选择有农田、灌木林、树林等不同植被覆盖的三幅(1∶10000)数字线划地图,经过外业实测、内业展绘、图上读取坐标、统计计算形成分析报告.着重分析了三幅图图幅的几何精度;探讨了全数字化摄影测量系统对不同地形类别和不同植被覆盖的适用性.最终得出了“利用全数字化摄影测量系统测制(1∶10000)数字线划地图”其几何精度可以达到传统的模拟测图和解析测图的几何精度的结论.

This project is a pilot for production applications using the total digitalizing photogrammetric system to produce digital line graphics （ 1：10000）. It discusses the geometric accuracy of the maps. It will be a solid base for producing the digital line graphics with total digitalizing photogrammetfic system on a large scale. The results come out from a large amount of experimental data. The kinds of terrain selected are plain, moderate hills and mountains and vegetations are farmland, bush land and woodland in the experimentation with 3 sheets of digital line graphics in scale 1：10000. With field survey, computer graphic, retrieving coordinates on maps and statistics, an analysis report was produced. This paper focuses on the analysis for geometric accuracy with 3 sheets maps, studying the suitability of the total digitalizing photogrammetric system for production in different kinds of terrain and vegetations. Furthermore, the anti - gross - errors＇ capacity of a digital encryption software was explored. The conclusion is that the geometric accuracy of the digital line graphics by total digitalizing photogrammetric system can reach by the traditional analogous methods or analytical methods.