Papers by valentina bonora
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Geomatic contributions to archaelogical investigations. The case of Torrione of Pollenzo (Piedmont - Italy)
Il rilievo della Basilica del Santo Sepolcro a Gerusalemme
attiasita.it
... 055.2756587 grazia.tucci@unifi.it, valentina.bonora@archimetro.it ... sistemi di rilievo di... more ... 055.2756587 grazia.tucci@unifi.it, valentina.bonora@archimetro.it ... sistemi di rilievo digitale e tridimensionale è stata archiviata una documentazione quanto più possibile completa dello stato attuale dell'intera fabbrica, dalle fondazioni che poggiano su roccia, alle strutture di ...
International Archives of Photogrammetry …, 2007
La pubblicazione è resa disponibile sotto le norme e i termini della licenza di deposito, secondo... more La pubblicazione è resa disponibile sotto le norme e i termini della licenza di deposito, secondo quanto stabilito dalla Policy per l'accesso aperto dell'Università degli Studi di Firenze ()
Geomatic Techniques and 3D Modeling for the Survey of the Church of the Holy Sepulchre in Jerusalem
conferencepartners.cz
... grazia.tucci@unifi.it Keywords laser scanning, 3D modelling, historical building, structural ... more ... grazia.tucci@unifi.it Keywords laser scanning, 3D modelling, historical building, structural analysis, communication project ... Helena excavated; a Romanesque church covered the Constantinian courtyard and a bell tower was added. [1] ...
Misurare l'irregolare: applicazioni della geomatica alla tutela e al recupero di un habitat rupestre a Gravina in Puglia
geomaticaeconservazione.it
... Grazia Tucci (*), Valentina Bonora (*), Nicola Crocetto (**), Alessia Nobile ... è caratteriz... more ... Grazia Tucci (*), Valentina Bonora (*), Nicola Crocetto (**), Alessia Nobile ... è caratterizzato dalla presenza di numerose cavità carsiche aperte su una profonda incisione scavata nella roccia calcarea dal torrente Gravina, da cui prendono il nome le famose gravine della Murgia. ...
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New tridimensional models can be useful for programs of conservation of cultural heritage. Models... more New tridimensional models can be useful for programs of conservation of cultural heritage. Models make easier the understanding and the communication of particularly shaped architectonic structures, through a synthetic vision. Our aim is to integrate different survey techniques (with their own accuracy) with computer graphics technologies, to create a dynamic 3D model representing phenomena and processes to be considered for preservation and restoration planning. We show some experiences of survey on different periods structures, stressing the close relationship between survey techniques and conservation problems: -Some buildings of "Borgo del Valentino" (Torino), a neomedioeval complex, with structural problems that make an accurate survey necessary in order to restore it; -Povil Casaforte (Aosta), a medioeval building, in which metric survey has been a support for stratigraphic analysis of the complex wall texture; -Villa Raggio (Asti), a 1900's villa, where we used a digital direct photogrammetry (control points are only used to verify the results). The model obtained can combine two different needs. On the one hand it had to be accurate in order to guarantee the usability for different technical purposes such as following the reconstruction projects or to schedule the routine maintenance and simulating technical installation. On the other hand it had to be photorealistic and user-friendly for an easy and effective representation, useful in virtual reality and other similar application.
The international archives of the photogrammetry, remote sensing and spatial information sciences/International archives of the photogrammetry, remote sensing and spatial information sciences, Feb 14, 2024
The increasing demand for 3D digital models has spurred the rapid evolution of technologies to ac... more The increasing demand for 3D digital models has spurred the rapid evolution of technologies to acquire, process, and disseminate 3D data of physical artifacts. Current scanners meet building surveying needs, prompting the exploration of closed systems with multiple sensors, custom accessories, control systems, and varied data processing approaches. While efficient in specific conditions, these systems require careful consideration of factors like technical requirements, environmental conditions, and the intended use of the final model. This article compares a static terrestrial laser scanner (TLS) and a portable mobile mapping system (PMMS) for documenting built heritage, focusing on the City Hall of Montecatini Terme in Italy. The Leica Geosystems RTC360 scanner provides quick scanning times and pre-alignment during fieldwork, reducing post-processing efforts. The Leica BLK2GO, belonging to the PMMS family, utilizes laser SLAM, visual SLAM, and inertial IMU measurements for rapid large-area documentation. The comparison assesses accuracy, completeness, and detail recognition, revealing that both systems are suitable for heritage documentation requiring centimetre-level accuracy. However, differences in point density and roughness indicate that the RTC360 may be better for intricate details. The BLK2GO excels in efficiency but is more oriented toward general representations at the architectural scale. This study emphasizes the importance of evaluating different methodologies based on project objectives and desired levels of detail, providing insights into the strengths and limitations of each system for diverse applications in heritage documentation.
Arno Riverbed Survey in Florence 1935 - 2019: From the Integrated Survey to the Geomatic Monitoring
Springer eBooks, 2022
This 3D modeling experience lies in the more general framework of large scale cartography aimed a... more This 3D modeling experience lies in the more general framework of large scale cartography aimed at conservation of an historical city center. The study has been applied to the ancient nucleus of "Certaldo Alto", a medieval village in Tuscany famous as Boccaccio's birthplace. The data acquisition project exploited the synergy of topography, photogrammetry and 3D scanning for generating a cartography at 1:500 scale. The model was built starting from a common aerophotogrammetric survey, suitable for generating a traditional cartographic representation. Instead of dropping the height information, it was employed for building a texturized 3D model, suitable for visualization and virtual visit of the site. Preliminarily to the 3D model creation a critical analysis of the data obtained by photogrammetry has been carried out and different objects have been assigned to different layers. 3D polylines have been then extruded from the vertexes of each building for generating the external walls. Similarly roofs surfaces have been identifi ed. All the elements not deductible by photogrammetry, as stairs, porches and overhangs, have been modeled through the integration of a topographic survey. The altimetry of the area has been obtained from an aerophotogrammety generated DTM. The model texturization with digital photographs allowed to add visual reality to the model. The fi nal passage to formats for animation (.avi) or interactive exploration (.wrl), allowed fi nally to dynamically present the town survey.
Laser technology for cross-section survey in ancient buildings: a study for S. M. Maggiore in Bergamo
Urban landscape complexity points out the increasing importance of a detailed geometric knowledge... more Urban landscape complexity points out the increasing importance of a detailed geometric knowledge, mostly for buildings with a historical and architectural value. So, an accurate building survey is needed, both for morphologic and dimensional documentations and for structural and material aspects. A study for monitoring and analyzing building structure becomes of easy approach, thanks to periodical testing of its level
Towers in San Gimignano: Metric Survey Approach
Journal of Performance of Constructed Facilities, Dec 1, 2017
AbstractThis paper presents the contribution of geomatics to the Seismic Risk of Monumental Build... more AbstractThis paper presents the contribution of geomatics to the Seismic Risk of Monumental Buildings (RiSEM) project and illustrates the metric survey that was conducted on several towers in San G...
Il rilievo metrico del teatro romano di Ventimiglia era stato eseguito negli scorsi anni per cont... more Il rilievo metrico del teatro romano di Ventimiglia era stato eseguito negli scorsi anni per conto della Soprintendenza Archeologica della Liguria. Nel presente lavoro viene dettagliata l'esperienza di rilievo eseguita con sistemi a scansione da più stazioni e vengono presentati i primi risultati ottenuti, analizzando in particolare metodologia e impostazione del rilievo, confronto tra i due tipi di rilievo, precisioni ottenibili, estrazione automatica di rappresentazioni 2D dal modello 3D. 1 L'acquisizione dei dati è stata effettuata con laser scanner RIEGL LMS-Z210. Si ringrazia Simone Orlandini e Daniele Rispoli per la disponibilità. Le specifiche tecniche del sensore utilizzato sono disponibili in:
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
The monument known as "Torrione" of Pollenzo (Piedmont-Italy), presently located in the garden of... more The monument known as "Torrione" of Pollenzo (Piedmont-Italy), presently located in the garden of the "Agenzia" pertaining to the reign of Carlo Alberto, is placed in an extra-urban area of the ancient Pollentia, a roman city of Tanaro valley, founded in the last first century B.C.. Formerly, near this monument, some soundings uncovered a domus and a cobblestone paved road ruins, but due to the uncertain conditions of some portions of the Torrione masonry, which was heavily injured by deeply rooted weed, a urgent restoration was needed. The masonry, kept in sight, have been cleaned out, strengthened and kept in safety. The geomatic side of deepening survey, applied both on the cleaned out masonry of Torrione and on the adjacent areas, has the role to provide a geometric contribution to catch up the settlement of the architectural structure. Several issues had to be considered during the survey planning: the complex settlement of Torrione ruins, the need of recording its features in the most comprehensive way, the requirement of comparison between the Torrione and other archaeological evidences, etc. So the survey campaign has been organized mixing different methodologies of data acquisition, able to guarantee the capability to mutually compare all the emerged structures, spatially and because of typological features.
Rilevamento e rappresentazione tra ricerca ed esperienze didattiche
Many historycal, architectural and archaelogical studies pointed on ruins and excavations of the ... more Many historycal, architectural and archaelogical studies pointed on ruins and excavations of the ancient city of Hierapolis, had provided building plans that have been recently collected in a urban map carried out through traverses surveying. (A GPS network connected to total station closed traverses assured reliable accuracy levels required for urban scale map 1:1000) The last project (2002), integrating relief terrain representation to the map, and global spatial data accuracy assessment, offered the chance to gain a digital map of the site. This topographical base is the fundamental spatial information of the growing GIS, aimed to manage heterogeneous nature data, obtained from different fields of study. This paper underline the need of multiscale spatial data for archaeological GIS; at the same time we explain the reasons of helpful features of this proper site map. Moreover, the continuous map updating is managed together with geometric entities editings; this task implies suitable reorganization of data. On the close-range side, large scale surveys are warmly requested; according to the urban scale sphere, we integrate just acquired data with new focused datasets, achieved by digital photogrammetry or with topographic methods. Purposes are various: ruins stability control, modern walls analyses, falling down studies, excavations documentation that need close range nadiral images (we used a jib-crane for acquisitions). Every level and type of geometric data is the metric reference for a huge amount of data sets collected in a relational database: images storages and alphanumeric data sets, come, at the moment, from a typical architectural interpretation of wall stone or marble blocks. Sharing informations is one of the main need of an archaeological site managing, and a carefully planned GIS can aid to gain the goal.
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The paper presents the first results of a multidisciplinary research project launched to support ... more The paper presents the first results of a multidisciplinary research project launched to support the conservation and restoration of the stone façades of the Pitti Palace in Florence with innovative techniques from the fields of geomatics and diagnostic analysis. Monitoring campaigns are periodically conducted on the façades of the palace to identify stone elements in critical conditions; such surveys primarily require close and careful observation of the façade, for which a crane basket is required. The paper proposes first attempt to compare results obtained through a traditional workflow with those coming from a deeper use of the high-resolution 3D model to conduct a virtual inspection and to map elements of vulnerability on a GIS. On a test area, the analysis of the factors considered relevant to the risk of detachment was carried out on the digital model and compared with what the experts observed on-site by carrying out Non-Destructive diagnostic tests. Traditionally conducted monitoring and diagnostic surveys are assumed to validate the proposed method, which, following a simple data analysis, remotely identifies all blocks detected as vulnerable by the in-situ inspection, potentially drastically reducing fieldwork. It is therefore proposed as a preliminary screening useful to better address further analysis.
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
In the last decades, surveys produced with geomatic techniques are increasingly used for the stud... more In the last decades, surveys produced with geomatic techniques are increasingly used for the study and conservation of the built heritage because they automatically collect large amounts of data with an accuracy and objectivity that could not be achieved with traditional techniques. As in other fields of digital and spatial humanities, the combination of spatial data with archival and secondary sources provides new tools for reconstructing the history, construction, and transformation of a historic architecture. The new digital survey of Pitti Palace, which was carried out between 2019 and 2021, has revealed aspects neglected by previous surveys and historical studies. Pitti Palace is the largest historical civil building in Florence. In the 16th century, Bartolomeo Ammannati carried out important extensions, including the so-called "spiral staircase", one of the most important staircases in the palace. This staircase, of which there is little documentation, although it is considered a masterpiece, was demolished at the beginning of the 19th century by Pasquale Poccianti to make way for the "New Secondary Staircase", on which previous studies have focused mainly on stylistic and decorative aspects. Using digital spatial data as a primary source, the research aimed to explain the construction history of the new staircase built by Poccianti, allowing a precise comparison between the archive documents and the actual geometry of the building elements. It also highlights previously undocumented features, including the evidence for the Ammannati staircase and the important changes made during the construction of the new staircase. The article shows how the insertion of the new staircase profoundly altered the design, structure and layout of a wing of the Pitti Palace. It also suggests how a more transdisciplinary and holistic approach helps the study of historical architecture.
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Papers by valentina bonora