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：2004
卷号：XXXV Part B5
页码：526-529
出版社：Copernicus Publications
摘要：We are used to consider as architectural heritage that par t of architecture belonging to "historical" periods and events. It is obvious that this classification, through the years, is always growing and the architecture "of interest" appears to be closer to our times. The different conception of architecture reflected in XX century's buildings appears even through a diff erent cognitive approach and representation. Even if surveying methods can be the same (topographical and photogrammetrical integrated with new instrumentations), surely its representation invites to research alternative ways respecting, chiefly, the evolution in documentation and pr eservation standar ds. Texture acquisition becomes of primary importance, to be employed in orthogonal projection and in rendering models, to better describe materials and their state of maintenance. It's fundamental that digital photographic documentation is realized controlling scientifically radiometr ic values, that is by colour space calibration, to allow absolute valuations on colorimetry state and to offer the possibility to compare values in different times, especially respect to maintenance and restoration works. The introduction of laser scanning instruments (underlining the 3D nature of survey) and the contemporary architectur e's being require to use different methods in representation: from orthogonal pr ojection, with vectorial drawings and ortho-r ectified images loaded, particularly meaningful if we think about a material knowledge of buildings, to three-dimensional models, suddenly employed directly in the design genesis ( such as in the latest architectural trend). Questions about a 3D representation are many, such as the concept of nominal scale, that is fundamental in every survey campaign, because it's not correct to bind it to the representative scale of all the projections originated from the model. Another matter is the way of model fruition: the possibility to explore its space, to quer y it about position, dimension, distances, area, volumes. These matters are strictly bounded to the choice of specif ic software: actually no one has the capability to answer simultaneously to the previous requirements. Moreover there are some other questions on the way to realize the model: by surfaces tr iangulating (2- or 3- dimensionally) clouds of points, or based on geometric solid primitives, or on voxel. All these subjects bring to consider the necessity of a revision of the rules in execution and representation of survey, to enlarge the canons already fixed in previous specifications
关键词：Photogrammetry; Architecture; Integration; Modelling; Laser scanner; Or thoimage; Multi-scale
