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：2007
卷号：XXXVI-5/W47
出版社：Copernicus Publications
摘要：The paper is deals with the application of terrestrial laser scanning for the generation of a 3D model of the historical settlement of San Pietro al Monte in Civate (Lombardia, Italy). In the first part we would like to give a presentation of existing georeferencing techniques that have been applied, and to make a comparison between them. In particular, techniques which allow a reduction of the ground constraints are analized here, i.e. direct georeferencing (in case of either stationing on already known points, and by using the TLS for the determination of stand-point coordinate as well), and surface matching algorithms. The corresponding achievable accuracies have been evaluated before during a testing stage in lab, and then at San Pietro al Monte. Moreover, some operational aspects involved in the application of different techniques in real projects are addressed. In the second part of paper the essential steps of the 3D object modelling (surface triangulation, editing, texture mapping and visualization) are reported with a presentation of the main problem: difficulties of data-transfer between different processing softwares; simplification of the model and errors due to file formats; memory request by softwares usually exceeds the physical memory which is currently available on computers
