By Raphaële Héno
Conventional topographic databases, received by way of catch on aerial or spatial photographs supply a simplified 3D modeling of our city setting, answering the wishes of various purposes (development, probability prevention, mobility administration, etc.). although, after we need to characterize and learn extra advanced websites (monuments, civil engineering works, archeological websites, etc.), those versions not suffice and different acquisition and processing skill need to be applied. This publication specializes in the learn of tailored lifting ability for "notable buildings". The tools tackled during this booklet hide lasergrammetry and the present recommendations of dense correlation in accordance with pictures utilizing traditional photogrammetry.
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Additional resources for 3D Modeling of Buildings. Outstanding Sites
Application au temple d’Abou-Simbel (Haute-Egypte)”, Communication de l’Institut Géographique National au Congrès des Sociétés Savantes, Paris, 1958. , “D’X,Y à X,Y,Z, de nouveaux outils pour l’étude architecturale et archéologique. Restitution 3D, lasergrammétrie et photogrammétrie: le cas de la citerne el-Nabih à Alexandrie”, Actes du colloque Virtual Retrospect 2009, Pessac, 18–20 November 2009, pp. 151–159, Archeovision, vol. 4, Editions Ausonius, Bordeaux, 2010. , Metric Survey Specifications for Cultural Heritage, English Heritage, 2009.
A survey with a laser scanner automates this process to some extent, since the equipment takes a systematic scan of the area according to a preset angular interval, which may be very precise, while the theodolite is only able to target isolated points. The initial result of a digitization from a laser scanner is a very dense 3D point cloud showing the surface of the building. The final model is produced by placing this next to neighboring point clouds situated in a unique reference system by appropriate methods.
Constraints on the high-speed rate of images are, in theory, less strict than for acquisitions by aircraft because it is easier to travel slowly without jeopardizing the stability of the camera holder. However, in practice, for reasons of cost effectiveness, cameras with high frame rates are also used. Inevitably, images from these devices will not be of the same quality (sharpness and lack of occlusions) as images acquired from a stationary position. Nevertheless, they can be sufficient for the survey of an entire district where the rendering is not the main objective.
3D Modeling of Buildings. Outstanding Sites by Raphaële Héno
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