构架航线在测制大比例尺地形图中的应用

通过在航空摄影的过程中增加垂直于基本航线的构架航线,在航摄区域的四角布设4个定向点,航线中间最弱处布设若干检查点,完成了GPS辅助空三,并最终进行航测内业成图;通过外业实地采集若干平面和高程检查点对地形图进行精度检查,验证了方法的可行性,具有较高的推广应用价值。

Application of Control Strip in Large Scale Topographic Map

This paper mainly described the method of adding control strip,which was perpendicular to the benchmark strip and setting up four directional points in the four corners of the area of aerial photography and several check points in the weakest part of the strip.It accomplished GPS-supported aerial triangulation and ultimately worked out the aerial map using this method.According to the results of field tests,the addition of control strip can dramatically decrease the workload of tasks in the field and improve the accuracy of the topographic map to the extent that meets specific requirements.As a result,the method illustrated in the paper is worthy of being widely applied.