HISTORIC STONE PAVEMENT PHOTOGRAMMETRIC 3D-SURVEY: A WAY TO GET A CATALOGUE TO PASS ON ANCIENT CRAFTS

Abstract. In Tuscany, the art of paving has never been codified in written form, being already encapsulated knowledge based on practical experience, with specialized tradesmen and stonemasons relying direct observation passing their to apprentices through repetition gestures. The streets Volterra, a historic town are still paved local stone, panchina volterrana (Volterran stone). Photogrammetry techniques allow high-resolution reconstruction 3-D pavement models geometric representation macrotexture component resulting from chiselling as well gaining high-resolution, high-precision geometry information along colour information. this way, it is possible fully characterize stone generate catalogue, which can become an operational tool for those involved monitoring maintaining pavements. This paper presents methodology photogrammetric surveying possibility obtaining indices processed surface terms Virtual Mean Texture Depth (V-MTD), analogy analysis asphalt surfaces. classification also proposed by integrating data derived segmentation different textures obtainable model (diffuse, ambient occlusion). could be then enriched stonemason's indications, constituting, therefore, one's experience.