Graphic techniques for the constructive identification of masonry vaults

Abstract eng:
Architecture use to be represented by the “iconography” of the floor plant, incorporating the projections of the ceiling by means of dashed lines. Sometimes, the expressivity of architecture is produced by the vaulted covering. The representation of the plane of the roof is a problem because the points are inaccessible for direct measuring. It has been done three campaigns to draw the gothic cathedral of Tortosa (Spain), using the following techniques: tachymetry (2000), photogrammetry and tachymetry (2012) and laser scanning (2013). The paper presents the methodology and results of the 2012 campaign, focused on the assessment of the heptagonal apse. By means of technological resources available to any professional, it has been obtained an accurate “iconography” of the vaulting. Geometrical anomalies of the masonry vaults are defined and analyzed by means of computer processing of the data using a 3D model, with an accuracy impossible to reach before. These results reveal new information about the construction process of the gothic apse.

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