摘要
首先提出利用正射影像及其立体匹配片组成的立体正射影像对作为建立地形三维立体模型的基础 ,并介绍了立体匹配片的原理 ,接着实现了两种类型立体匹配片的制作和镶嵌 ,利用镶嵌之后的正射影像及其立体匹配片可以构建大范围地形的三维立体模型 ,从而建立三维工程设计平台应用于工程设计 ,并对该平台的量测性能进行了测试 ,最后介绍了该技术在输电线路设计、交通线路设计等具体工程设计领域的实际应用。
Up to now,almost all civil engineering design has been implemented on two_dimensional maps including line map,digital terrain model,etc.Terrain,physiognomy and objects are expressed with lines and specific symbols on these two_dimensional maps,and sometimes some knowledge and experience of cartography is required to correctly identify the character of terrain and physiognomy.In addition,two_dimensional line maps can not accurately and detailedly express the features of terrain and physiognomy.For these reasons civil engineers always dream to design on three_dimensional stereo environment and continuously struggle for the goal.To meet such requirement,three_dimensional visualization engineering design is studied in this paper.It is widely known that a three_dimensional stereo model of terrain can be built by using stereo ortho_images including an orthophoto and its stereo_mate.Such a three_dimensional stereo model can not only be viewed stereoscopically,but also be measured.In addition,with the development of digital photogrammetry,the ortho_images can be produced automatically and rapidly.So,firstly,this paper uses stereo ortho_images to build the three_dimensional stereo model of terrain as three_dimensional the designing environment.According to the requirement of original data and measurement performance,stereo ortho_images can be classified into two categories and the production and mosaic of two kinds of orthophoto stereo_mate have been described.Because measurement accuracy is one of the performances being most concerned in civil engineering design,the emphasis is placed on the measurement performance of stereo ortho_images.This paper discusses both the measurement theory and the measurement accuracy.Test results show that the measurement accuracy can reach a very high level that is enough to meet the requirement of civil engineering design.Three_dimensional engineering design and measurement platform has been built on large_ranged three_dimensional stereo model produced by mosaic orthophoto and its stereo_mate.In the end,the application of this technology to specific engineering design fields is introduced.Compared to the conventional two_dimensional map_based civil engineering design,three_dimensional visualization civil engineering design system has the following characteristics:1) Its measurement performance is good enough to be used in civil engineering design;2) It provides better understanding and recognition of terrain features,objects and does good for protecting environment and farmlands;3) Terrain features and ground objects can be viewed stereoscopically;4) It provides convenience for decision;5) It is easy to be combined with civil engineering design CAD software.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2002年第4期337-342,共6页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目 (40171081)
