3D MODELING FOR UNDERWATER ARCHAEOLOGICAL DOCUMENTATION: METRIC VERIFICATIONS

Abstract. The survey in underwater environment has always presented considerable difficulties both operative and technical and this has sometimes made it difficult to use the techniques of survey commonly used for the documentation of Cultural Heritage in dry environment. The work of study concerns the evaluation in terms of capability and accuracy of the Autodesk123DCatch software for the reconstruction of a three-dimensional model of an object in underwater context. The subjects of the study are models generated from sets of photographs and sets of frames extracted from video sequence. The study is based on comparative method, using a reference model, obtained with laser scanner technique…

L’insegnamento della Geomatica nell’attuale quadro dell’offerta formativa universitaria

L’articolo riporta e analizza i risultati del censimento promosso nello scorso anno dall’AUTeC (Associazione Universitari di Topografi a e Cartografi a), relativamente all’offerta didattica universitaria svolta in questo settore disciplinare, confrontandoli con quelli dei due precedenti censimenti effettuati negli anni 2005 e 2007. Da questo confronto emerge l’evoluzione dell’insegnamento delle discipline topografi che successivamente alla riforma Berlinguer-Zecchino, che ha radicalmente cambiato obiettivi e organizzazione didattica dei vari corsi di laurea, e dopo le prime fasi di applicazione del nuovo ordinamento.

GPS-GIS integrated system for electromagnetic pollution

In these last years employment and spreading of GPS real-time kinematic techniques is greatly improved. Its application field is extended from traditional topographic surveys to environmental applications. In this work a monitoring project of electromagnetic pollution is shown; this project has been carried out in order to realize an infrastructure of measurement, transmissions, elaboration and management of surveyed data. In particular, the results of a research about the realization of a first prototype of advanced system based on the integration of GPS receivers and other sensors are shown. The research has been carried out in collaboration with "Dipartimento di Ricerche Energetiche ed A…

Innovative techniques for survey and communication of cultural heritage

This paper deals with the survey and communications of Cultural Heritage through the development of innovative methodologies. The case of study is the polychrome wooden ceiling in the “Magna” Hall of “Palazzo Steri”. The “Steri”, built in the XIVth century by the noble family Chiaromonte, is at the present the headquarter of the Rector’s Office of Palermo University. A 3D model of the wooden ceiling has initially been carried out with laser-scanning and digital photogrammetric techniques; successively a multimodal interactive guide has been realized. The guide is integrated to the 3D model, so that visitors can navigate the virtual representation of the ancient wood ceiling and achieve, int…

Stime rigorose di accuratezza e parallassi residue su blocchi acquisiti industrialmente

Hyperspectral techniques and GIS for archaeological investigation

Aerial photos, both in colour and in black and white, have always been very important tools in archaeological surveys. Sensors, called hyperspectral, were available on the market for some years: they are able to expand the research beyond the visible area of the electromagnetic spectrum as far as the thermal infrared too. The use of these sensors, at first restricted to the applications in the traditional fields of Remote Sensing (such as, for instance, Botany, Agronomy, Geology, Hydrology), was spreading, in recent years, to some sectors, such as archaeological surveys, which were unexplored before. The presence of structures and hollows in the top subsurface is likely to cause variations …