基于航摄的大比例尺地形图测绘精度保证技术研究  

Research on Surveying Accuracy Guaranteeing Technology for Large-Scale Topographic Mapping Based on Aerial Photography

作　　者：庄建霞 ZHUANG Jianxia(Nantong Surveying and Mapping Institute Co.,Ltd.,Nantong,Jiangsu Province,226006 China)

机构地区：[1]南通市测绘院有限公司,江苏南通226006

出　　处：《科技资讯》2025年第3期38-40,共3页Science & Technology Information

摘　　要：由于现有精度保证技术误差较大,因此研究基于航摄的大比例尺地形图测绘精度保证技术。选取适宜的地面分辨率(Ground Sampling Distance,GSD),对航拍影像进行匀光匀色处理,筛选清晰度最高的纹理,对投影的线段进行精确配准。导入预处理好的影像数据及其对应的坐标信息,从配对的影像中提取特征点。运用实景三维测图软件绘制大比例地形图,通过误差范围的计算,判断偏移程度,增加绘制精度。测试表明,在不同检测点中,平面位置的最大交叉未超过0.3 m,绘制的地形图成果精度完全符合大比例尺地形图测绘精度要求,精度均匀可靠,提高了作业效率,达到了良好的应用效果。Due to the significant error of the existing accuracy guaranteeing technology,this paper studies the map-ping accuracy guaranteeing technology of large-scale topographic map based on aerial photography.The suitable Ground Sampling Distance(GSD)was selected to perform uniform light and color processing on aerial images,and the texture with the highest resolution was selected to accurately register the projected line segments.The pre-processed image data and corresponding coordinate information are imported to extract feature points from paired images.Large-scale topographic map is drawn by using 3D mapping software,and by calculating the error range,the deviation degree is judged and the drawing precision is increased.The test shows that the maximum cross of the plane position in different detection points does not exceed 0.3 m,and the accuracy of the topographic map is fully in line with the requirements of large scale topographic map mapping accuracy.The accuracy is uniform and reli-able,the working efficiency is improved,and the good application effect is achieved.

关 键 词：航摄 大比例尺 测绘 高精度 

分 类 号：P231[天文地球—摄影测量与遥感]