Polytechnic University of Valencia Congress, ARQUEOLÓGICA 2.0 - 8th International Congress on Archaeology, Computer Graphics, Cultural Heritage and Innovation

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RECONSTRUCCIÓN FOTOGRAMÉTRICA DE LA TORRE GÓTICA DE LA IGLESIA DE SANTA MARIA DE ALCAÑIZ
Luis Agustín Hernández, Angélica Fernández Morales

Last modified: 21-09-2016

Abstract


This paper presents the photogrammetric reconstruction of a Gothic building, a tower with an approximate height of 45 meters and an approximately octagonal (chamfered square) plan, from 280 photographs taken with a drone and distances measured manually. Due to the number of photographs, the reconstruction work was done in several parts or chunks, corresponding to the photographs of the different drone flights, which were combined to create a single mesh. For sizing the model, by not having topographical heights distances but manually measured distances, CAD drawing and triangulation were used for the creation of a coordinate system and obtainment of a set of coordinates. Subsequently, copies of the model were used to obtain meshes of different resolutions, as well as to generate orthophotos of the chamfers, rotating the model 45 degrees. Based on the three-dimensional model four types of 2D documents were obtained: orthophotos, automatic elevations in raster format, automatic elevations in CAD format and manually redrawn elevations; in all four cases for both facades as chamfers.

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