期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：1998
卷号：XXXII Part 4
出版社：Copernicus Publications
摘要：In its traditional form, photogrammetry has developed a rich suite of procedures for measurement and mapping of naturaltopographic forms, including low-relief areas as well as mountainous regions. The design and operation of aerialcameras, including choices of lens focal lengths, film formats, and overlaps in both endlap and sidelap directions, arebased on the premise that the photogrammetric measurement process will take place within stereo pairs, whoseperspective model will permit the viewing or analytic resection of all points on the ground. Even where steep cliffs occur,the cases where a part of the model is obscured (not visible in both members of the stereo pair) tend to be the exceptionrather than the rule.Recently, a great deal of attention has been directed toward the accurate representation of the „urban landscape“, inwhich all buildings - as well as the streets between - are measured through photogrammetric procedures. The manyvertical surfaces of the faces of buildings represent total discontinuities in slope; and the amount of model area beingblocked from view creates a significant percentage of the project having less than stereo coverage. This paper describessome of the requirements to be met in three-dimensional modeling of urban projects, as well as discussing some of thechanges which have to be implemented in photogrammetric procedures in order to fulfill the expectations of the datausers.
