Jamali, Ali3; Antón Castro, Francesc/François1; Boguslawski, Pawel3; Gold, Christopher M.3
1 National Space Institute, Technical University of Denmark2 Geodesy, National Space Institute, Technical University of Denmark3 University of Technology Malaysia
Surveying can be done using several sciences and techniques for outdoor and indoor data acquisition like photogrammetry, land surveying, remote sensing, Global Positioning System (GPS) and laser scanning. Electronic Distance Measurement (EDM) is a reliable and frequently used technique. Laser scanning is costly and time consuming compared to the other mentioned techniques. Currently, GPS is one of the most commonly used techniques to measure coordinates, distances and angles between points in outdoor environments, but it has drawbacks in indoor environments (e.g. signal penetration and multiple paths). Currently, for indoor surveying, EDM and Terrestrial Laser Scanner (TLS) are mostly used. In this paper, several techniques for indoor 3D building data acquisition have been investigated. A rapid technique for indoor building data acquisition, with a special focus put on a rangefinder (a mobile device) is proposed. The accuracy of the rangefinder is evaluated and a simple spatial model from real data reconstructed. This technique is rapid (it requires a shorter time as compared to others), however the results show inconsistencies in horizontal angles for short distances in indoor environments. Results were calibrated by a least square adjustment algorithm. Future research attempts will investigate object reconstruction algorithms to optimize measurements.
Proceedings. the Xxv Fig International Congress 2014, 2014