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/C53
出版社：Copernicus Publications
摘要：Today, the laser scanners are widely used in the field of architectural, archaeological and environmental surveying because of their practicality and flexibility. A laser scanning machine can be considered as a high automation reflectorless total station; by means of a laser based measurement of distance and accurate angular movement, a target object is sampled in a regular mesh of 3D points. To achieve a real comparison between the technical qualities of the laser scanning machine and reflectorless total station, the case of a high slots and in a vertical position, had been chosen at El-Khazneh (the treasury) at Petra in Jordan, where the use of traditional measuring methods, if not impossible, at least are very difficult to achieve. These slots are located in an inaccessible place beside El- Khazneh, on both the right and the left side. Until now there are no satisfactory measurements of those slots. There are two rows of approximately square holes. The problem of how to choose the viewpoint positions and the time represents important factors of the survey for those slots where the mountainous environment surrounding El-Khazneh restricts potential sensor stations. To overcome this problem and to achieve precise measurements of those slots, we used a 3D laser scanner (Mensi GS 100) to build a 3D mesh model, and a modern reflector-less total station (Leica), which has the ability to use a visible laser beam. The two techniques, the problems and difficulties that arose during the survey process are shown in the paper. The obtained result of these two techniques will be discussed and evaluated
关键词：Compression; Laser scanning; Application; Accuracy; Point Cloud; Surveying; Acquisition; Processing
