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• W779950488 abstract "Terrestrial laser scanning technology is one of the most important revolutions in surveying: it is a fast, accurate, and cost-efficient method of gathering three-dimensional data for use in 3D models and mapping; it can be widely used in many interrelated fields, such as engineering constructions and 3D measurements, owing to its prominent characteristics of high efficiency and high precision, moreover laser scanner images can also be used in virtual reality applications which can be used to study complex three dimensional data and to explore human interaction with results that are still in digital format. The example presented in this paper, the Cave of Olerdola, is an ideal environment to test and to develop interactive applications in a complex urban scale model, which will allow exploring possible reconstructions and its comparison to its present day situation. In this case study it’s possible to demonstrate the potentiality of the integration between two systems: a fast accurate 3D modeling from Terrestrial Laser Scanner and GIS data, and its real-time visualization in a virtual reality environment. The choice of using a Terrestrial Laser Scanner to survey the test site was due to its complexity; irregular slope, difficult accessibility and, as consequence, in measuring its conformation with traditional topographic methods. A one day campaign was necessary to acquire the laser scanner raw data (point clouds) and the photos with which the 3d model has been created by registering and optimizing the point clouds, creating and editing a polygonal model and texturizing the result with high resolution photos. The digital terrain model of the context was generated by ortho photos and GIS cartography, to complete the laser scanner model and to recreate a realistic environment. This final 3D model was introduced in Alice, visualization software produced by the Virtual Reality Centre (CRV) from the UPC. Alice was developed with the idea that the best way to accelerate development in a new medium such as VR is to provide tools that allows people without highly technical backgrounds to create program for it. A user is able to interact with the virtual reconstruction using a mobile portable workbench; which allows position tracking and stereo viewing." @default.
• W779950488 created "2016-06-24" @default.
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• W779950488 date "2009-01-01" @default.
• W779950488 modified "2023-09-27" @default.
• W779950488 title "Olerdola's cave, Catalonia past and present: a virtual reality reconstruction from terrestrial laser scanner and gis data" @default.
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