航空摄影测量一体化成图的两种方法

The two intergrated mapping methods of aerial photogrammetry

航空摄影测量内外业一体化成图过程中,如果采用单像加DEM的方法对数字判绘成果进行纠正,在地形起伏较大的复杂地貌区域遇到了很多的问题,当DEM存在较大误差时得到的纠正成果精度不好。阐述了单像加DEM进行纠正的原理,并对成果的误差进行了分析。介绍了双像立体后交—前交解求空间坐标的方法,并对双像立体与单像加DEM两种成图方法进行比较。

During the intergrated mapping producing in office and field operations of aerophotogrammetrie, when using a single image assisant with DEM to rectify the digital annotation results, there will be many problems in the rough mountain areas, and the precision will even not match the map accuracy specification. It presents the principle of the rectification using a single image with DEM, and gives analysis of errors of the result firstly, then introduces the method of double stereogram resection - forward intersection to get the spatial position, and last has a compare with the two methods. Our test reslut reveals that the method of double stereogram can resolve the problems that the first method will meet in the rough mountain area, and can achieve a higher precision result.