期刊名称：Archiwum Fotogrametrii, Kartografii i Teledetekcji
印刷版ISSN：2083-2214
出版年度：2009
卷号：19
语种：English
出版社：Main Board of Association of Polish Surveyors
摘要：Digital orthophotomap is at present the most popular cartographic product. However,in built-up areas,images of buildings are displaced according to the central projection,and part of the terrain is invisible (the so-called "occluded area"”). A true orthomap does not have such defects. The digital surface model (DSM) is however necessary,with spatial models of buildings to make it. The paper discusses technical aspects of the true-ortho generation. Special requirements relating to the execution of air photos are considered,along with the analysis of generating the building models based on the manual stereo digitalisation of the terrain model built on the basis of photos,automatic image matching,and laser data (LIDAR). The influence of source data on the quality of the outcome true-ortho,and the costs of its producing are reviewed. Preliminary results are presented. Works are continued.
其他摘要：Ortofotomapa jest obecnie najbardziej popularnym produktem kartograficznym. W obszarze zabudowanym obrazy budynków są jednak przesunięte zgodnie z rzutem środkowym, a część terenu jest zakryta (tzw. „martwe pola”). Tej wady nie ma „prawdziwe” orto (true-o
关键词：orthophotomap;true-ortho;occluded area;visibility map;digital surface model (DSM);dense DSM;image matching;building extraction;LIDAR
