摘要
传统地形图测绘多采用全站仪、GNSS-RTK等作业方法,效率较低,且在野外环境下难以保障测绘人员的人身安全。以无人机倾斜摄影测量技术为基础,进行某地区的1∶500比例尺地形图生产作业,利用ContextCapture软件构建测区实景三维模型,采用三维模型测图和立体测图相结合的方式进行地形要素提取,并利用实地勘察测量方式对地形图成果进行精度检核。结果表明:检测建筑物特征边长、检核点平面坐标及高程中误差分别为0.0787 m、0.0102 m、0.0326 m,满足规范精度和生产使用要求;相比传统方法,地形图生产效率得到了大幅度提升。该测绘方法对于大范围面积内大比例尺地形图的测绘生产具有较大的现实指导和推广意义。
The total station,GNSS-RTK and other operation methods are mostly used in traditional topographic map surveying and mapping,which are low in efficiency and it is difficult to guarantee the surveyors’safety in the field environment.Based on the UAV tilt photogrammetry technology,the production of 1∶500 scale topographic map of a certain area was carried out.ContextCapture software was used to build a 3D model of the survey area,and terrain elements were extracted by combining 3D model mapping and stereoscopic mapping,and the accuracy of topographic map results was checked by field investigation and measurement.The results show that the median errors in detecting building feature side length,checking point plane coordinates and elevation are respectively 0.0787 m,0.0102 m and 0.0326 m,which meet the requirements of standard accuracy and production use.Compared with the traditional method,the production efficiency of topographic map has been greatly improved.This surveying and mapping method has high practical guidance and popularization significance for the surveying and mapping production of large scale topographic map in a large area.
作者
宋秉红
SONG Binghong(Lanzhou Urban Construction Design Institute,Lanzhou 730050,China)
出处
《经纬天地》
2024年第3期83-86,共4页
Survey World
关键词
倾斜摄影测量
实景三维模型
立体测图
中误差
oblique photogrammetry
real three-dimensional model
stereo mapping
median error
