Stefano BERTOCCI / Michele CORNIETI / Michelangelo TIEFENTHALER

(Department of Architectural Design of the University of Florence, Italy)

About the Archaeological Heritage survey the decoding of the elements, of the images, can bring back a reality which is still alive, written on the walls, told by the very stones the houses, the buildings, the monuments, the streets and the squares of the city are made of. To study, catalogue and preserve accurately these traces of the past is the core of the problem of the preservation of historical remains; it also means making information about different historical periods available, making a solid picture of the historical value not only of the monument but also of the whole social communities of the territory.
A teen years experience in the .archaeological heritage survey of boundary walls of Iasos in Caria have given good opportunities to test the possibilities regarding the preciseness and the level of detail offered by the plane photogrammetry supported by an accurate topographic survey. A “cloud of points”, enough dense, allows the planarisation of surfaces characterised by a quite rugged morphology, with restrained errors and with the possibility of carry out metric and stratigraphic analysis based on high resolution photograms. Moreover, by starting from these “levelled” surfaces, it turns out to be easy to reconstruct the canonical views with their anomalies and foreshortenings, through the 3D modelling or through the conventional representation in orthographic projections.
One more field regards the restitution of the mosaic house , with its high resolution photograms, which can support the 1:1 scale. Moreover, the model VRML represents the spreader egress for the non-experts, beside being a nimble instrument for the comprehension of the complete picture, it is also a useful instrument for the conservation of the monument’s image with high resolution on a surfing model. In particular, the acquisition and three-dimensional representation technologies such as computer vision, photogrammetry, laser scanning develop information of unimaginable complexity up to a few years ago and whose codes of representation are still to be defined and are being investigated.