Search results for " LASER SCANNER"
showing 10 items of 32 documents
Rilievo integrato presso il Borgo Schirò (PA)
2013
Il lavoro qui presentato consiste in un rilievo integrato (Topografico/GPS statico/NRTK/Laser Scanner) di un piccolo contesto extraurbano siciliano, Borgo Schirò, noto per le vicende storiche che portarono alla sua costruzione a seguito dell’emanazione della legge n.1 del 2 gennaio 1940, per il superamento del latifondo. Data la natura varia degli elementi da rilevare (edifici, arredo urbano, strade) sono state adottate tecniche di acquisizione diversificate per ognuno di essi, le quali, in forma integrata, hanno permesso un utile confronto finale degli elaborati prodotti, offrendo la possibilità di effettuare analisi qualitative altamente accurate su singoli casi strutturali ed elevati gra…
Integrating topographic, photogrammetric and laser scanning techniques for a scan-to-bim process
2021
Abstract. The preservation of historic buildings can often be particularly difficult due to the lack of detailed information about architectural features, construction details, etc.. However, in recent years considerable technological innovation in the field of Architecture, Engineering, and Construction (AEC) has been achieved by the Building Information Modeling (BIM) process. BIM was developed as a methodology used mainly for new construction but, given its considerable potential, this approach can also be successfully used for existing buildings, especially for buildings of historical and architectural value. In this case, it is more properly referred to as Historic – or Heritage – Buil…
Surveying in the Valley of the Temples
2014
Full-waveform terrestrial laser scanning enables high-precision 3D topographic modelling of unstable rock valleys that is valuable for various geomorphological investigations. The area below the archaeological site of Temple of Juno in Agrigento, Sicily, is characterised by the presence of large sections of rock that have fallen down from the upper ridge. In this context, full-waveform laser scanning technology was tested for the production of a highly detailed 3D topographic model at two resolutions (2cm and 20cm) for simulating potential rockfall paths at the site.
Full-Waveform Terrestrial Laser Scanning for Extracting a High-Resolution 3D Topographic Model: a Case Study on an Area of Archaeological Significance
2014
AbstractThis paper describes a method, which uses full-waveform terrestrial laser scanning to survey the surface of the slope below the Temple of Juno, located in the Valley of the Temples in Agrigento (Sicily, Southern Italy). The surface is characterized by the presence of large rock blocks, which have fallen down from the upper side; possible further detachments of rock blocks would cause a situation of general instability, with a very high risk to the archaeological structures in the near future. The methodology was designed to evaluate the potential of full-waveform laser scanning technology for the production of a very high resolution 3D topographic model of the slope, to be used as a…
Digital Correlation Method Based on Microgeometrical Texture Patterns for Strain Fields Measurements
2005
International audience; Digital correlation method is widely used in experimental mechanics to obtain the deformation field. Currently this method is applied with digital images of the initial and deformed surface sprayed with black or white painting. Speckle patterns are then captured and the correlation can be made with high 0.01 pixel accuracy in 2D-cases. In three-dimensions, the stereo-correlation can be used with a lower accuracy. The work presented in this paper, is a first approach based on the use of a 3D laser scanner in the objective of three-dimensional strain field measurement. The digital speckle patterns are not given by gray level but from the micro-geometrical surface textu…
Un “laboratorio” di conoscenza nel Mediterraneo. Il Castello Utveggio a Palermo.
2009
Il presente studio approfondisce le tematiche, su esposte, ponendo l’attenzione sull’edificio storico “Il Grande Albergo Castello Utveggio”, che - per scelta di luogo e di destinazione d’uso, eccezionale per avvenimenti tecnici e costruttivi finalizzati a realizzarlo - presenta caratteristiche peculiari di identità di luogo fortemente correlato con la città di Palermo, con il paesaggio della Conca d’Oro e con il territorio. Posto sulla sommità del Primo Pizzo nel settore meridionale del Monte Pellegrino a 346 m s.l.m., è rivolto verso la città e il porto, fu progettato dall’architetto Giovan Battista Santangelo e realizzato nei primi decenni del ‘900.
Geomatic applications tourban park in palermo
2015
Over the last few years topographical techniques have developed an exponential trend towards simplifying and speeding, both survey operations and analysis of data collected reaching at the same time ever higher levels of accuracy. Among the technologies that are increasingly taking the field in this context is part of the Mobile Mapping System (MMS) that, on any mobile platform, combines sensors and measurement systems designed to provide a 3D position of the platform and, at the same time, capable to acquire geographic data without the aid of control points on the ground. The study reported concerns the verification of the reliability metrics and a qualitative MMS in order to evaluate its …
Analisi e comparazione di modelli di superficie di reperti archeologici realizzati tramite laser scanner e fotogrammetria
2009
La ricerca svolta si è posta come obiettivo quello di verificare l’accuratezza di modelli di superficie (Digital Surface Model – DSM) di reperti archeologici realizzati attraverso procedure fotogrammetriche. La sperimentazione è stata condotta su alcuni reperti, già oggetto di studio in precedenti ricerche, conservati presso il museo Archeologico Regionale di Palermo. In questo lavoro vengono presentati i primi risultati relativi al rilievo della metopa di “Europa rapita dal Toro”. I DSM, generati con due differenti software di fotogrammetria, sono stati messi a confronto con il DSM ottenuto con un laser scanner a triangolazione ottica. Tale modello è stato considerato come riferimento per …
RPAS AND TLS TECNIQUES FOR ARCHAEOLOGICAL SURVEY: THE CASE STUDY OF THE ARCHAEOLOGICAL SITE OF ERACLEA MINOA (ITALY)
2018
Abstract. Digital documentation and 3D modelling of archaeological sites are important for understanding, definition and recognition of the values of the sites and of the archaeological finds. The most part of archaeological sites are outdoor location, but a cover to preserve the ruins protects often parts of the sites. The possibility to acquire data with different techniques and merge them by using a single reference system allows creating multi-parties models in which 3D representations of the individual objects can be inserted. The paper presents the results of a recent study carried out by Geomatics Laboratory of University of Palermo for the digital documentation and 3D modelling of E…
3D survey in complex archaeological environments: An approach by terrestrial laser scanning
2018
Abstract. The survey of archaeological sites by appropriate geomatics technologies is an important research topic. In particular, the 3D survey by terrestrial laser scanning has become a common practice for 3D archaeological data collection. Even if terrestrial laser scanning survey is quite well established, due to the complexity of the most archaeological contexts, many issues can arise and make the survey more difficult. The aim of this work is to describe the methodology chosen for a terrestrial laser scanning survey in a complex archaeological environment according to the issues related to the particular structure of the site. The developed approach was used for the terrestrial laser s…