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：494-497
出版社：Copernicus Publications
摘要：GPS Virtual Station technique fundamentally depends on determination of a virtual point by GPS that is just about 1,5 meters above the ground or a platform surface and then to the use of it by other sur veying and/or photogr ammetric instruments such as a total station and/or a camera. Thus, the technique offers a challenge in terrestrial photogrammetry to determine the coordinates of control points distributed on each facade of any object in any size and in a reference system, which is globally available, and without using a network of points set up on the ground and surrounding the object. The technique is also capable of determination of camera perspective centre's coordinates by the use of GPS Virtual Station which is determined by the GPS antenna. In this process, first, GPS antenna is set up on a tripod with a leveled triprach to collect GPS Virtual Station coordinates and then it is removed from the triprach and replaced with a camera (i.e. digital camera) in a similar way of that can even be followed with total station to be used for the measurement of control points on the facades. So, it means that the network of points to be set up for the measurements of control points on the objects in interest and which is the most cost effective part of a over all project is removed, no more hustle for it, and three unknown parameters are now known values when considering that the camera perspective centre is determined as GPS Virtual Station, and so that the number of control points on the facades can be reduced, and there is no location limitation for chose of points, so that they can freely be chosen at any time (even in the middle of a measurement section if some kinds of problems are met, such as GPS signal blockage and object coverage problems) at any where around the object and finally, every object measured using this technique in any part of the wor ld can easily and spatially linked and referred to one another with respect to the same ref erence system
关键词：Textured image; Digital Photogrammetry; 3D model; GPS Virtual Station; GPSSIT
