实景三维DEM生产关键技术及质量检查方法

Key Technologies and Quality Inspection Methods in Real 3D DEM Production

实景三维作为新型基础测绘标准化产品,为数字中国提供统一的空间定位框架和分析基础,是数字政府、数字经济重要的数据资源和生产要素,其中地形级实景三维是城市级和部件级实景三维的承载基础。根据地形级实景三维DEM生产实践,对影像匹配技术及DEM的编辑处理进行探讨。采用目前常用的PixelGrid、CIPS和INPHO影像处理系统进行影像匹配,针对基于资源三号卫星影像DSM数据的匹配效果,探讨实景三维DEM生产中不同软件影像初始匹配结果的综合运用方法,以及不同地貌类型区域的人工编辑方法;同时从不同检查角度,对DEM成果的质量检查方法和注意事项进行总结,为相关项目生产提供参考。

As a new standardized surveying and mapping product,real 3D provides a unified spatial positioning framework and analysis basis for Digital China,which is an important data resource and factor of Digital Government and Digital Economy.Topographic real 3D is the carrying base of city level and component level real 3D.According to the production practice of topographic 3D DEM,the image matching technology and DEM editing processing are discussed.PixelGrid,CIPS,INPHO and others adopted in image processing systems commonly are used for image matching.According to the matching effect of DSM data based on ZY3 images,the comprehensive application method of initial image matching results with different softwares in real 3D DEM production and the manual editing method of different geomorphic regions are discussed.At the same time,the quality inspection methods and matters for attention of DEM results are summarized in different inspection perspectives,providing reference for the production of related projects.