非量测数码相机用于水利工程测绘的试验研究

Experimental Study on Non-Metric Digital Camera in the Hydraulic Engineering Surveying and Mapping

非量测数码相机进行水利工程地形测绘的作业流程包括相机标定、像控点选设与测量、影像拍摄、数字影像处理、全数字摄影测量系统数据采集、地形图编辑等。几个试验测区的地形图测绘精度统计表明,利用非量测数码相机获取的数码影像基本能够满足高山峡谷地区200 m摄影距离内的1 m等高距1∶1 000地形图成图要求,也可以满足高山峡谷地区400 m摄影距离内的2 m等高距1∶2 000地形图成图要求。

The operation process of non-metric digital camera used in the hydraulic engineering surveying and mapping contains camera calibration,puncturing points and surveying for aero-photo,image capture,digital image processing,digital photogrammetry system data acquisition and map compilation.The statistics of topographic mapping accuracy indicate that it is not only able to meet the requirement of 1∶1 000 scale topographic map of 1 m contours line interval is survyed within 200 m in alp and canyon areas,but also the 1∶2 000 scale topographic map of 2 m contours line interval is survyed within 400 m in alp and canyon areas.