The performance of the latest terrestrial laser scanners allows an expanded range of uses of these instruments. Even for laser scanners intended for architectural surveying, the maximum operational ranges reach, or in some cases exceed, 100-150 m. With such ranges, it is possible to utilize the instruments not only for measurements of single architectural elements but also for urban surveying of entire blocks or districts. This has raised the need to define a precise and reliable method to exploit the potential of these scanners. In this paper, we report the preliminary results of a procedure designed to exploit both laser scanner technology and the Global Positioning System (GPS) for surveying on an urban scale. The GPS was used to determine the three-dimensional coordinates of the homologous points used to merge together the scans. Use of the GPS allowed us to record the scans even if they did not greatly overlap. Moreover, it was possible to conduct the surveying campaign with extreme elasticity; in fact, with the GPS, the scans are georeferenced automatically even if acquired at different times and the data can easily be used for cartographic or cadastral purposes.
CYRAX 2500 laser scanner and GPS operational flexibility: from detailed close range surveying to urban scale surveying
BALZANI, Marcello;PELLEGRINELLI, Alberto;PERFETTI, Nicola;RUSSO, Paolo;UCCELLI, Federico;
2002
Abstract
The performance of the latest terrestrial laser scanners allows an expanded range of uses of these instruments. Even for laser scanners intended for architectural surveying, the maximum operational ranges reach, or in some cases exceed, 100-150 m. With such ranges, it is possible to utilize the instruments not only for measurements of single architectural elements but also for urban surveying of entire blocks or districts. This has raised the need to define a precise and reliable method to exploit the potential of these scanners. In this paper, we report the preliminary results of a procedure designed to exploit both laser scanner technology and the Global Positioning System (GPS) for surveying on an urban scale. The GPS was used to determine the three-dimensional coordinates of the homologous points used to merge together the scans. Use of the GPS allowed us to record the scans even if they did not greatly overlap. Moreover, it was possible to conduct the surveying campaign with extreme elasticity; in fact, with the GPS, the scans are georeferenced automatically even if acquired at different times and the data can easily be used for cartographic or cadastral purposes.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
