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Alessandro Capra
DIEF Department, University of Modena and Reggio Emilia, 41125 Modena, Italy

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Journal article
Published: 17 September 2020 in Remote Sensing
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Underwater photogrammetry is increasingly being used by marine ecologists because of its ability to produce accurate, spatially detailed, non-destructive measurements of benthic communities, coupled with affordability and ease of use. However, independent quality control, rigorous imaging system set-up, optimal geometry design and a strict modeling of the imaging process are essential to achieving a high degree of measurable accuracy and resolution. If a proper photogrammetric approach that enables the formal description of the propagation of measurement error and modeling uncertainties is not undertaken, statements regarding the statistical significance of the results are limited. In this paper, we tackle these critical topics, based on the experience gained in the Moorea Island Digital Ecosystem Avatar (IDEA) project, where we have developed a rigorous underwater photogrammetric pipeline for coral reef monitoring and change detection. Here, we discuss the need for a permanent, underwater geodetic network, which serves to define a temporally stable reference datum and a check for the time series of photogrammetrically derived three-dimensional (3D) models of the reef structure. We present a methodology to evaluate the suitability of several underwater camera systems for photogrammetric and multi-temporal monitoring purposes and stress the importance of camera network geometry to minimize the deformations of photogrammetrically derived 3D reef models. Finally, we incorporate the measurement and modeling uncertainties of the full photogrammetric process into a simple and flexible framework for detecting statistically significant changes among a time series of models.

ACS Style

Erica Nocerino; Fabio Menna; Armin Gruen; Matthias Troyer; Alessandro Capra; Cristina Castagnetti; Paolo Rossi; Andrew Brooks; Russell Schmitt; Sally Holbrook. Coral Reef Monitoring by Scuba Divers Using Underwater Photogrammetry and Geodetic Surveying. Remote Sensing 2020, 12, 3036 .

AMA Style

Erica Nocerino, Fabio Menna, Armin Gruen, Matthias Troyer, Alessandro Capra, Cristina Castagnetti, Paolo Rossi, Andrew Brooks, Russell Schmitt, Sally Holbrook. Coral Reef Monitoring by Scuba Divers Using Underwater Photogrammetry and Geodetic Surveying. Remote Sensing. 2020; 12 (18):3036.

Chicago/Turabian Style

Erica Nocerino; Fabio Menna; Armin Gruen; Matthias Troyer; Alessandro Capra; Cristina Castagnetti; Paolo Rossi; Andrew Brooks; Russell Schmitt; Sally Holbrook. 2020. "Coral Reef Monitoring by Scuba Divers Using Underwater Photogrammetry and Geodetic Surveying." Remote Sensing 12, no. 18: 3036.

Preface
Published: 06 June 2017 in Applied Geomatics
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ACS Style

Andreas Wieser; Alessandro Capra. Special issue: deformation monitoring. Applied Geomatics 2017, 9, 79 -80.

AMA Style

Andreas Wieser, Alessandro Capra. Special issue: deformation monitoring. Applied Geomatics. 2017; 9 (2):79-80.

Chicago/Turabian Style

Andreas Wieser; Alessandro Capra. 2017. "Special issue: deformation monitoring." Applied Geomatics 9, no. 2: 79-80.

Article
Published: 11 May 2017 in Structural Control and Health Monitoring
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This paper focuses on the integration of geodetic monitoring and geotechnical modeling for the analyses of subsidence induced settlements in historic structures. The aim is the assessment of the behavior over time of the monuments, with particular attention to differential settlements, in order to evaluate the potential risk scenarios in a preventive strategy. The methodology is applied to the UNESCO site of Modena where the Cathedral and the Ghirlandina Tower are characterized by strong visible deformations due to a complex construction history, the peculiar subsoil conditions and the effects of both natural and man induced subsidence. A 3D finite element numerical model has been developed taking into account the soil characteristics gained by laboratory and in situ tests. The model takes into account the influence of previously existing structures, as well as the subsidence phenomena and provides a settlements profile in agreement with the real dataset collected by high-precision leveling. The geodetic monitoring, carried out since 1984, allows to optimize and then to validate the numerical model giving the Conservation Authority a useful tool to manage the safety of the heritage.

ACS Style

Cristina Castagnetti; Renato Maria Cosentini; Renato Lancellotta; Alessandro Capra. Geodetic monitoring and geotechnical analyses of subsidence induced settlements of historic structures. Structural Control and Health Monitoring 2017, 24, 1 .

AMA Style

Cristina Castagnetti, Renato Maria Cosentini, Renato Lancellotta, Alessandro Capra. Geodetic monitoring and geotechnical analyses of subsidence induced settlements of historic structures. Structural Control and Health Monitoring. 2017; 24 (12):1.

Chicago/Turabian Style

Cristina Castagnetti; Renato Maria Cosentini; Renato Lancellotta; Alessandro Capra. 2017. "Geodetic monitoring and geotechnical analyses of subsidence induced settlements of historic structures." Structural Control and Health Monitoring 24, no. 12: 1.

Journal article
Published: 16 June 2016 in ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Recent advances in automation of photogrammetric 3D modelling software packages have stimulated interest in reconstructing highly accurate 3D object geometry in unconventional environments such as underwater utilizing simple and low-cost camera systems. The accuracy of underwater 3D modelling is affected by more parameters than in single media cases. This study is part of a larger project on 3D measurements of temporal change of coral cover in tropical waters. It compares the accuracies of 3D point clouds generated by using images acquired from a system camera mounted in an underwater housing and the popular GoPro cameras respectively. A precisely measured calibration frame was placed in the target scene in order to provide accurate control information and also quantify the errors of the modelling procedure. In addition, several objects (cinder blocks) with various shapes were arranged in the air and underwater and 3D point clouds were generated by automated image matching. These were further used to examine the relative accuracy of the point cloud generation by comparing the point clouds of the individual objects with the objects measured by the system camera in air (the best possible values). Given a working distance of about 1.5 m, the GoPro camera can achieve a relative accuracy of 1.3 mm in air and 2.0 mm in water. The system camera achieved an accuracy of 1.8 mm in water, which meets our requirements for coral measurement in this system.

ACS Style

T. Guo; A. Capra; M. Troyer; A. Gruen; A. J. Brooks; J. L. Hench; R. J. Schmitt; S. J. Holbrook; M. Dubbini. ACCURACY ASSESSMENT OF UNDERWATER PHOTOGRAMMETRIC THREE DIMENSIONAL MODELLING FOR CORAL REEFS. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2016, XLI-B5, 821 -828.

AMA Style

T. Guo, A. Capra, M. Troyer, A. Gruen, A. J. Brooks, J. L. Hench, R. J. Schmitt, S. J. Holbrook, M. Dubbini. ACCURACY ASSESSMENT OF UNDERWATER PHOTOGRAMMETRIC THREE DIMENSIONAL MODELLING FOR CORAL REEFS. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. 2016; XLI-B5 ():821-828.

Chicago/Turabian Style

T. Guo; A. Capra; M. Troyer; A. Gruen; A. J. Brooks; J. L. Hench; R. J. Schmitt; S. J. Holbrook; M. Dubbini. 2016. "ACCURACY ASSESSMENT OF UNDERWATER PHOTOGRAMMETRIC THREE DIMENSIONAL MODELLING FOR CORAL REEFS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B5, no. : 821-828.

Journal article
Published: 10 September 2015 in Structural Control and Health Monitoring
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The research focuses on structural monitoring and movements identification applied to cultural heritage protection. The final purpose is the integration among different and independent technologies for analyzing and investigating the geometry changing over time of ancient leaning towers. The paper deals with a novel strategy implemented to compute differential vertical displacements starting from results obtained by repeated high-precision leveling network adjustments. These results usually aim at monitoring the subsidence phenomenon, while their use in engineering applications is more or less absent in literature. Moreover, the multidisciplinary approach is also able to analyze subsidence gradients in order to extrapolate the trend of the vertical axis and compute structure's rotations. The approach is applied to the Ghirlandina Tower, Modena (Italy), in order to identify the leaning and the subsidence trend. About 30 years of leveling campaigns provide a useful dataset to test the methodology, which is finally validated by the independent observations collected by a pendulum. The approach allows to compute the mean total displacement since 1984 of about 4.7 cm with 30% occurring over the last 6 years. In the same period, the total overhang of the tower (1.30 m in 2007) increased by about 19.1 and 10.4 mm towards southwest. The approach is also able to identify anomalous behavior of the tower such as the reversal tilting trend due to the scaffolding in the years of restoration and the permanent deformation suffered after the 2012 Emilia Romagna earthquake (failure of 4 mm in 6 months). Copyright © 2015 John Wiley & Sons, Ltd.

ACS Style

Cristina Castagnetti; Eleonora Bertacchini; Alessandro Capra. Monitoring leaning towers by geodetic approaches: effects of subsidence and earthquake to the Ghirlandina Tower. Structural Control and Health Monitoring 2015, 23, 580 -593.

AMA Style

Cristina Castagnetti, Eleonora Bertacchini, Alessandro Capra. Monitoring leaning towers by geodetic approaches: effects of subsidence and earthquake to the Ghirlandina Tower. Structural Control and Health Monitoring. 2015; 23 (3):580-593.

Chicago/Turabian Style

Cristina Castagnetti; Eleonora Bertacchini; Alessandro Capra. 2015. "Monitoring leaning towers by geodetic approaches: effects of subsidence and earthquake to the Ghirlandina Tower." Structural Control and Health Monitoring 23, no. 3: 580-593.

Conference paper
Published: 20 June 2015 in Transactions on Petri Nets and Other Models of Concurrency XV
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This paper presents a literature review on the methodology called Volunteered Geographic Information (VGI) and its use for Landslide Risk Assessment (LRA). General risk assessment procedures are discussed and the potential contributions of VGI are identified, in particular when quantitative characterization of factors such as Hazard, Vulnerability and Exposure is required. The review shows that the standard LRA procedures may benefit from input given by surveyors when performing hazard assessments, while crowdsourced data would be a valuable support in vulnerability/damage assessment studies. The review also highlights several limitations related to the role of VGI and crowdsourcing in LRA.

ACS Style

Francesco Mancini; Alessandro Capra; Cristina Castagnetti; Claudia Ceppi; Eleonora Bertacchini; Riccardo Rivola. Contribution of Geomatics Engineering and VGI Within the Landslide Risk Assessment Procedures. Transactions on Petri Nets and Other Models of Concurrency XV 2015, 635 -647.

AMA Style

Francesco Mancini, Alessandro Capra, Cristina Castagnetti, Claudia Ceppi, Eleonora Bertacchini, Riccardo Rivola. Contribution of Geomatics Engineering and VGI Within the Landslide Risk Assessment Procedures. Transactions on Petri Nets and Other Models of Concurrency XV. 2015; ():635-647.

Chicago/Turabian Style

Francesco Mancini; Alessandro Capra; Cristina Castagnetti; Claudia Ceppi; Eleonora Bertacchini; Riccardo Rivola. 2015. "Contribution of Geomatics Engineering and VGI Within the Landslide Risk Assessment Procedures." Transactions on Petri Nets and Other Models of Concurrency XV , no. : 635-647.

Journal article
Published: 22 May 2015 in Applied Geomatics
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ACS Style

Alessandro Capra; Marco Scaioni; Andreas Wieser. Special issue: terrestrial remote sensing for areal deformation monitoring. Applied Geomatics 2015, 7, 61 -63.

AMA Style

Alessandro Capra, Marco Scaioni, Andreas Wieser. Special issue: terrestrial remote sensing for areal deformation monitoring. Applied Geomatics. 2015; 7 (2):61-63.

Chicago/Turabian Style

Alessandro Capra; Marco Scaioni; Andreas Wieser. 2015. "Special issue: terrestrial remote sensing for areal deformation monitoring." Applied Geomatics 7, no. 2: 61-63.

Journal article
Published: 22 May 2015 in Rendiconti Lincei. Scienze Fisiche e Naturali
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Monitoring the time history of structures and infrastructures has always been an important area of application of geodetic and geomatic methods. Here we shall concentrate on the item of monitoring ancient buildings because, beyond its intrinsic interest, it provides a good illustration of some of the most recent monitoring techniques. Identifying the overhang, progressive changes of inclination, differential movements of the structure and detailing the study of structural elements are just some examples of the many fundamental and necessary information for structural engineers. Those data are required to study and analyze the behavior of a structure with the purpose to assess the stability. Looking at the several methods offered by Geomatics, laser scanning appears to be the best technology to provide an effective 3D solution to those requirements. Surveying by means of a terrestrial laser scanner, allows to detect a huge number of 3D information with high accuracy in a relatively short time and high accuracy. Just analyzing the point clouds, interesting information along with useful products can be obtained in order to draw some considerations about the investigated structure. This research aims at suggesting a new philosophy for using 3D models in a diagnostic perspective in order to study structures along with their actual dimensions, their stability and so on. Traditionally, indeed, laser scanning is chosen for artistic and architectural studies and the resulting three-dimensional model represents what often is of concern. Furthermore, the use of more classic techniques, such as total station and digital leveling, and LST is fundamental as an integrated approach for the monitoring of ancient buildings. The integration of different techniques allow a redundancy of observation and the possibility to verify the results obtained form independent techniques as is shown throughout some experimental applications.

ACS Style

Alessandro Capra; Eleonora Bertacchini; Cristina Castagnetti; Riccardo Rivola; Marco Dubbini. Recent approaches in geodesy and geomatics for structures monitoring. Rendiconti Lincei. Scienze Fisiche e Naturali 2015, 26, 53 -61.

AMA Style

Alessandro Capra, Eleonora Bertacchini, Cristina Castagnetti, Riccardo Rivola, Marco Dubbini. Recent approaches in geodesy and geomatics for structures monitoring. Rendiconti Lincei. Scienze Fisiche e Naturali. 2015; 26 (S1):53-61.

Chicago/Turabian Style

Alessandro Capra; Eleonora Bertacchini; Cristina Castagnetti; Riccardo Rivola; Marco Dubbini. 2015. "Recent approaches in geodesy and geomatics for structures monitoring." Rendiconti Lincei. Scienze Fisiche e Naturali 26, no. S1: 53-61.

Journal article
Published: 09 April 2015 in The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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The 3D reconstruction with a metric content of a submerged area, where objects and structures of archaeological interest are found, could play an important role in the research and study activities and even in the digitization of the cultural heritage. The reconstruction of 3D object, of interest for archaeologists, constitutes a starting point in the classification and description of object in digital format and for successive fruition by user after delivering through several media. The starting point is a metric evaluation of the site obtained with photogrammetric surveying and appropriate 3D restitution. The authors have been applying the underwater photogrammetric technique since several years using underwater digital cameras and, in this paper, digital low cost cameras (off-the-shelf). Results of tests made on submerged objects with three cameras are presented: © Canon Power Shot G12, © Intova Sport HD e © GoPro HERO 2. The experimentation had the goal to evaluate the precision in self-calibration procedures, essential for multimedia underwater photogrammetry, and to analyze the quality of 3D restitution. Precisions obtained in the calibration and orientation procedures was assessed by using three cameras, and an homogeneous set control points. Data were processed with © Agisoft Photoscan. Successively, 3D models were created and the comparison of the models derived from the use of different cameras was performed. Different potentialities of the used cameras are reported in the discussion section. The 3D restitution of objects and structures was integrated with sea bottom floor morphology in order to achieve a comprehensive description of the site. A possible methodology of survey and representation of submerged objects is therefore illustrated, considering an automatic and a semi-automatic approach.

ACS Style

A. Capra; M. Dubbini; E. Bertacchini; Cristina Castagnetti; F. Mancini. 3D RECONSTRUCTION OF AN UNDERWATER ARCHAELOGICAL SITE: COMPARISON BETWEEN LOW COST CAMERAS. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2015, XL-5/W5, 67 -72.

AMA Style

A. Capra, M. Dubbini, E. Bertacchini, Cristina Castagnetti, F. Mancini. 3D RECONSTRUCTION OF AN UNDERWATER ARCHAELOGICAL SITE: COMPARISON BETWEEN LOW COST CAMERAS. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. 2015; XL-5/W5 ():67-72.

Chicago/Turabian Style

A. Capra; M. Dubbini; E. Bertacchini; Cristina Castagnetti; F. Mancini. 2015. "3D RECONSTRUCTION OF AN UNDERWATER ARCHAELOGICAL SITE: COMPARISON BETWEEN LOW COST CAMERAS." The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-5/W5, no. : 67-72.

Journal article
Published: 01 March 2015 in NCSLI Measure
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This paper discusses an approach for evaluating the accuracy of dense 3D surface reconstruction techniques based on images. So far, the emergence of these novel techniques has not been supported by the definition of an internationally recognized standard which is fundamental for user confidence and market growth. In order to provide an element of reflection and solution to the different communities involved in image-based 3D modeling, we present an approach for the assessment of the metric performance of an open-source set of routines for bundle block adjustment and dense image matching (Apero/MicMac). The evaluation is performed using a metrological approach, through comparisons between image-based 3D generated data and ‘reference’ data acquired with two hemispherical laser scanners, one total station, and one laser tracker. Aspects of traceability and measurement uncertainty of all these reference 3D data are discussed. The methodology is applied to two case studies, tailored to analyze the software capabilities in dealing with both outdoor and environmentally controlled conditions. Comparative data and accuracy evidence provided by both tests allow the study of some key factors affecting 3D model accuracy.

ACS Style

Isabella Toschi; Jean-Angelo Beraldin; Luc Cournoyer; Livio De Luca; Alessandro Capra. Evaluating Dense 3D Surface Reconstruction Techniques using a Metrological Approach. NCSLI Measure 2015, 10, 38 -48.

AMA Style

Isabella Toschi, Jean-Angelo Beraldin, Luc Cournoyer, Livio De Luca, Alessandro Capra. Evaluating Dense 3D Surface Reconstruction Techniques using a Metrological Approach. NCSLI Measure. 2015; 10 (1):38-48.

Chicago/Turabian Style

Isabella Toschi; Jean-Angelo Beraldin; Luc Cournoyer; Livio De Luca; Alessandro Capra. 2015. "Evaluating Dense 3D Surface Reconstruction Techniques using a Metrological Approach." NCSLI Measure 10, no. 1: 38-48.

Conference paper
Published: 24 October 2013 in SPIE Remote Sensing
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Satellite images are a tool increasingly used in environmental monitoring and in recent years have become also strongly used in the field of archaeology. In this study it was conducted an experimental analysis on the identification of wetlands from satellite images in order to identify sites of interest from the archaeological point of view because probable sites of ancient settlements. The studied area is the Plan de la Limagne which is located in North-East of the French city of Clermont-Ferrand. For wet areas identification were used two ASTER satellite images and pre-existing carthography. Different indexes have been used to identify wet areas. First of all, it was used the NDVI (Normalized Difference Vegetation Index) to discriminate bare soils. Secondly, through the Tasseled Cap transform, other indexes were obtained, such as the Greeness Index, the Brightness Index (SBI – Soil Brightnes Index) and the Wetness Index. Then it has been used the ATI index (Apparent Thermal Inertia) that provides information on the thermal inertia of soils. Through these indexes, visual inspection and the study of spectral signatures, it has been tried not only to identify wetlands within the images, but also to find repeatable processes for the detection of these areas. Some “anomalous” areas, that are probably wet areas, have been identified with this procedure. The identification of wet areas has been carried out in a raw way, this is surely a first approximation analysis. Certainly the in situ analysis would provide the possibility of a better evaluation, in fact field measurements could be used to calibrate the model and then find an effective and repeatable procedure for identifying wetlands.

ACS Style

Eleonora Bertacchini; Francesca Despini; Sergio Teggi; Alessandro Capra; Marco Dubbini. Attempt of identification of wet areas with ASTER images for archeological studies. SPIE Remote Sensing 2013, 8893, 88931L .

AMA Style

Eleonora Bertacchini, Francesca Despini, Sergio Teggi, Alessandro Capra, Marco Dubbini. Attempt of identification of wet areas with ASTER images for archeological studies. SPIE Remote Sensing. 2013; 8893 ():88931L.

Chicago/Turabian Style

Eleonora Bertacchini; Francesca Despini; Sergio Teggi; Alessandro Capra; Marco Dubbini. 2013. "Attempt of identification of wet areas with ASTER images for archeological studies." SPIE Remote Sensing 8893, no. : 88931L.

Journal article
Published: 22 July 2013 in The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Among the many open-source software solutions recently developed for the extraction of point clouds from a set of un-oriented images, the photogrammetric tools Apero and MicMac (IGN, Institut Géographique National) aim to distinguish themselves by focusing on the accuracy and the metric content of the final result. This paper firstly aims at assessing the accuracy of the simplified and automated calibration procedure offered by the IGN tools. Results obtained with this procedure were compared with those achieved with a test-range calibration approach using a pre-surveyed laboratory test-field. Both direct and a-posteriori validation tests turned out successfully showing the stability and the metric accuracy of the process, even when low textured or reflective surfaces are present in the 3D scene. Afterwards, the possibility of achieving accurate 3D models from the subsequently extracted dense point clouds is also evaluated. Three different types of sculptural elements were chosen as test-objects and "ground-truth" data were acquired with triangulation laser scanners. 3D models derived from point clouds oriented with a simplified relative procedure show a suitable metric accuracy: all comparisons delivered a standard deviation of millimeter-level. The use of Ground Control Points in the orientation phase did not improve significantly the accuracy of the final 3D model, when a small figure-like corbel was used as test-object.

ACS Style

I. Toschi; R. Rivola; E. Bertacchini; Cristina Castagnetti; Marco Dubbini; A. Capra. VALIDATION TESTS OF OPEN-SOURCE PROCEDURES FOR DIGITAL CAMERA CALIBRATION AND 3D IMAGE-BASED MODELLING. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2013, XL-5/W2, 647 -652.

AMA Style

I. Toschi, R. Rivola, E. Bertacchini, Cristina Castagnetti, Marco Dubbini, A. Capra. VALIDATION TESTS OF OPEN-SOURCE PROCEDURES FOR DIGITAL CAMERA CALIBRATION AND 3D IMAGE-BASED MODELLING. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. 2013; XL-5/W2 ():647-652.

Chicago/Turabian Style

I. Toschi; R. Rivola; E. Bertacchini; Cristina Castagnetti; Marco Dubbini; A. Capra. 2013. "VALIDATION TESTS OF OPEN-SOURCE PROCEDURES FOR DIGITAL CAMERA CALIBRATION AND 3D IMAGE-BASED MODELLING." The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-5/W2, no. : 647-652.

Journal article
Published: 10 July 2013 in Earth Surface Processes and Landforms
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A slow moving compound rock slide located in the northern Apennines of Italy was mapped and monitored through the integration of Airborne Laser Scanning (ALS), multi‐temporal long‐range Terrestrial Laser Scanning (TLS), and Automated Total Station (ATS) measurements. Landslide features were mapped using a High Resolution Digital Terrain Model (HR‐DTM) obtained by merging ALS and TLS data in an Iterative Closest Point (ICP) procedure. Slope movements in the order of centimeters to a few decimeters were quantified with Differential TLS (D‐TLS) based on a Surface Matching approach and supported by ATS data to define stable reference surfaces. The integrated approach allowed mapping of the composite geomorphic features of the rock slide under examination, revealing its complex dynamic nature and further proving that laser scanning is a versatile and widely applicable tool for slope process analysis. Copyright © 2013 John Wiley & Sons, Ltd.

ACS Style

Alessandro Corsini; Cristina Castagnetti; Eleonora Bertacchini; Riccardo Rivola; Francesco Ronchetti; Alessandro Capra. Integrating airborne and multi-temporal long-range terrestrial laser scanning with total station measurements for mapping and monitoring a compound slow moving rock slide. Earth Surface Processes and Landforms 2013, 38, 1330 -1338.

AMA Style

Alessandro Corsini, Cristina Castagnetti, Eleonora Bertacchini, Riccardo Rivola, Francesco Ronchetti, Alessandro Capra. Integrating airborne and multi-temporal long-range terrestrial laser scanning with total station measurements for mapping and monitoring a compound slow moving rock slide. Earth Surface Processes and Landforms. 2013; 38 (11):1330-1338.

Chicago/Turabian Style

Alessandro Corsini; Cristina Castagnetti; Eleonora Bertacchini; Riccardo Rivola; Francesco Ronchetti; Alessandro Capra. 2013. "Integrating airborne and multi-temporal long-range terrestrial laser scanning with total station measurements for mapping and monitoring a compound slow moving rock slide." Earth Surface Processes and Landforms 38, no. 11: 1330-1338.

Book chapter
Published: 11 March 2013 in Landslide Science and Practice
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National Road SS63 is endangered by large scale slope instability phenomena few km north of the Cerreto Pass (northern Apennines, Italy). At the Col Piagneto slope, SS63 was closed two times in the past 50 years after landslide events. In 1974, the collapse of portion of a rock slide triggered a debris slide that buried more than 50 m of the road track. In 2008, the reactivation of an earth slide in eastern portion of the slope damaged about 400 m of the “new” track built to by-pass the 1974 risk area. In order to evaluate if it is worthwhile keeping the old track open to traffic, or it is maybe better to repair the new track a comprehensive study was financed by Emilia Romagna Region. Research methods included: high resolution DEM, landslides mapping, continuous displacement and groundwater monitoring. Results allowed to assess different semi-quantitative risk scenario for the road structures or vehicles.

ACS Style

Alessandro Corsini; Francesco Ronchetti; Eleonora Bertacchini; Francesco Bonacini; Paolo Calicetti; Alessandro Capra; Cristina Castagnetti; Elena Piantelli; Giuseppe Caputo; Giovanni Truffelli. Large-Scale Slope Instability Affecting SS63 Near the Cerreto Pass (Northern Apennines, Italy). Landslide Science and Practice 2013, 231 -237.

AMA Style

Alessandro Corsini, Francesco Ronchetti, Eleonora Bertacchini, Francesco Bonacini, Paolo Calicetti, Alessandro Capra, Cristina Castagnetti, Elena Piantelli, Giuseppe Caputo, Giovanni Truffelli. Large-Scale Slope Instability Affecting SS63 Near the Cerreto Pass (Northern Apennines, Italy). Landslide Science and Practice. 2013; ():231-237.

Chicago/Turabian Style

Alessandro Corsini; Francesco Ronchetti; Eleonora Bertacchini; Francesco Bonacini; Paolo Calicetti; Alessandro Capra; Cristina Castagnetti; Elena Piantelli; Giuseppe Caputo; Giovanni Truffelli. 2013. "Large-Scale Slope Instability Affecting SS63 Near the Cerreto Pass (Northern Apennines, Italy)." Landslide Science and Practice , no. : 231-237.

Book chapter
Published: 14 February 2013 in Landslide Science and Practice
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Rapid assessment of landslide activity is important in case of adverse climatic conditions leading to civil protection’s alerts that require increased surveillance of risk areas. GB-InSAR is nowadays becoming a consolidated near-sensing monitoring technique for slope movements. It can be installed rapidly and it can rapidly provide results in the form of displacement maps. However, it has never been thoroughly tested in radar-hostile conditions such as these posed by large-scale earth slides – earth flows covered by a canopy of trees bushes and meadows, that are the typical landslides in Emilia Romagna Apennine. As sparse small villages, buildings, roads and other lifelines are often built on these landslide bodies, they are of particular concern for civil protection, especially during prolonged rainfall periods that determine attention/alerting conditions. To test the possibility to achieve improved surveillance capability in case of attention needed, a series of GB-InSAR spot campaigns lasting from a week to a month, was carried out in 2010–11 in several landslides of Emilia Romagna Apennine using a commercial interferometric radar. The aim was to evaluate the performance of the technique for rapid assessment of landslide activity, even in case of partly vegetated soil coverage conditions. The paper deals with the results obtained in 3 out of the 11 monitored sites.

ACS Style

Alessandro Corsini; Matteo Berti; Antonio Monni; Marco Pizziolo; Francesco Bonacini; Federico Cervi; Giuseppe Ciccarese; Francesco Ronchetti; Eleonora Bertacchini; Alessandro Capra; Angela Gallucci; Mauro Generali; Giampiero Gozza; Valeria Pancioli; Sara Pignone; Giovanni Truffelli. Rapid Assessment of Landslide Activity in Emilia Romagna Using GB-InSAR Short Surveys. Landslide Science and Practice 2013, 391 -399.

AMA Style

Alessandro Corsini, Matteo Berti, Antonio Monni, Marco Pizziolo, Francesco Bonacini, Federico Cervi, Giuseppe Ciccarese, Francesco Ronchetti, Eleonora Bertacchini, Alessandro Capra, Angela Gallucci, Mauro Generali, Giampiero Gozza, Valeria Pancioli, Sara Pignone, Giovanni Truffelli. Rapid Assessment of Landslide Activity in Emilia Romagna Using GB-InSAR Short Surveys. Landslide Science and Practice. 2013; ():391-399.

Chicago/Turabian Style

Alessandro Corsini; Matteo Berti; Antonio Monni; Marco Pizziolo; Francesco Bonacini; Federico Cervi; Giuseppe Ciccarese; Francesco Ronchetti; Eleonora Bertacchini; Alessandro Capra; Angela Gallucci; Mauro Generali; Giampiero Gozza; Valeria Pancioli; Sara Pignone; Giovanni Truffelli. 2013. "Rapid Assessment of Landslide Activity in Emilia Romagna Using GB-InSAR Short Surveys." Landslide Science and Practice , no. : 391-399.

Journal article
Published: 01 January 2013 in European Journal of Remote Sensing
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This paper discusses critical issues related to the reliability of topographic monitoring systems such as ATS (Automated Total Stations), GNSS (Global Navigation Satellite System) and Ground Based InSAR focusing the attention on controlling the stability of networks infrastructure, which have influence on data correction procedures but are often taken for granted, and on integrating results in GIS (Geographic Information System), under a common reference framework and with respect to open-access ancillary data. The novelty of the paper lies in the demonstration of the efficiency obtained by a proper implementation of the system. Discussion makes reference to an active landslide by using ATS, GNSS and Ground Based InSAR in continuous and periodic mod

ACS Style

Cristina Castagnetti; Eleonora Bertacchini; Alessandro Corsini; Alessandro Capra. Multi-sensors integrated system for landslide monitoring: critical issues in system setup and data management. European Journal of Remote Sensing 2013, 46, 104 -124.

AMA Style

Cristina Castagnetti, Eleonora Bertacchini, Alessandro Corsini, Alessandro Capra. Multi-sensors integrated system for landslide monitoring: critical issues in system setup and data management. European Journal of Remote Sensing. 2013; 46 (1):104-124.

Chicago/Turabian Style

Cristina Castagnetti; Eleonora Bertacchini; Alessandro Corsini; Alessandro Capra. 2013. "Multi-sensors integrated system for landslide monitoring: critical issues in system setup and data management." European Journal of Remote Sensing 46, no. 1: 104-124.

Journal article
Published: 10 October 2012 in Water Resources Research
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[1] The D8, D8-LTD, D∞-LTD, D∞, MD∞, and MD8 flow direction methods are evaluated against field observations of overland flow dispersion obtained from novel experimental methods. Thin flows of cold water were released at selected points on a warmer slope and individual overland flow patterns originating from each of these points were observed using a terrestrial laser scanner and a thermal imaging camera. Land microtopography was determined by using laser returns from the dry land surface, whereas overland flow patterns were determined by using either laser returns or infrared emissions from the wetted portions of the land surface. Planar overland flow dispersion is found to play an important role in the region lying immediately downslope of the point source, but attenuates rapidly as flow propagates downslope. In contrast, existing dispersive flow direction methods are found to provide a continued dispersion with distance downslope. Predicted propagation patterns, for all methods considered here, depend critically on the size h of grid cells involved. All methods are found to be poorly sensitive in extremely fine grids (h ≤ 2 cm), and to be poorly specific in coarse grids (h = 2 m). Satisfactory results are, however, obtained in grids having resolutions h that approach the average flow width (50 cm), with the best performances displayed by the MD8 method in the finest grids (5 ≤ h ≤ 20 cm), and by the MD∞, D∞, and D∞-LTD methods in the coarsest grids (20 cm < h ≤ 1 m).

ACS Style

Stefano Orlandini; Giovanni Moretti; Mauro Alessandro Corticelli; Paolo E. Santangelo; Alessandro Capra; Riccardo Rivola; John D. Albertson. Evaluation of flow direction methods against field observations of overland flow dispersion. Water Resources Research 2012, 48, 1 .

AMA Style

Stefano Orlandini, Giovanni Moretti, Mauro Alessandro Corticelli, Paolo E. Santangelo, Alessandro Capra, Riccardo Rivola, John D. Albertson. Evaluation of flow direction methods against field observations of overland flow dispersion. Water Resources Research. 2012; 48 (10):1.

Chicago/Turabian Style

Stefano Orlandini; Giovanni Moretti; Mauro Alessandro Corticelli; Paolo E. Santangelo; Alessandro Capra; Riccardo Rivola; John D. Albertson. 2012. "Evaluation of flow direction methods against field observations of overland flow dispersion." Water Resources Research 48, no. 10: 1.

Journal article
Published: 24 December 2010 in Journal of Geophysical Research
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A semipermanent Global Positioning System (GPS) network of 30 vertices known as the Victoria Land Network for Deformation Control (VLNDEF) was set up in the Austral summer of 1998 in northern Victoria Land (NVL), including Terra Nova Bay (TNB), Antarctica. The locations were selected according to the known Cenozoic fault framework, which is characterized by a system of NW-SE regional faults with right-lateral, strike-slip kinematics. The TNB1 permanent GPS station is within the VLNDEF, and following its installation on a bedrock monument in October 1998, it has been recording almost continuously. The GPS network has been surveyed routinely every two summers, using high-quality, dual-frequency GPS receivers. In this study we present the results of a distributed session approach applied to the processing of the GPS data of the VLNDEF. An improved reference frame definition was implemented, including a new Euler pole, to compute the Antarctic intraplate residual velocities. The projection of the residual velocities on the main faults in NVL show present-day activities for some faults, including the Tucker, Leap Year, Lanterman, Aviator, and David faults, with right-lateral strike-slip kinematics and local extensional and compressional components. This active fault pattern divides NVL into eight rigid blocks, each characterized by its relative movements and rigid rotations. These show velocities of up to several millimeters per year, which are comparable to those predicted by plate tectonic theory at active plate margins.

ACS Style

Marco Dubbini; Paola Cianfarra; G. Casula; Alessandro Capra; F. Salvini. Active tectonics in northern Victoria Land (Antarctica) inferred from the integration of GPS data and geologic setting. Journal of Geophysical Research 2010, 115, 1 .

AMA Style

Marco Dubbini, Paola Cianfarra, G. Casula, Alessandro Capra, F. Salvini. Active tectonics in northern Victoria Land (Antarctica) inferred from the integration of GPS data and geologic setting. Journal of Geophysical Research. 2010; 115 (B12):1.

Chicago/Turabian Style

Marco Dubbini; Paola Cianfarra; G. Casula; Alessandro Capra; F. Salvini. 2010. "Active tectonics in northern Victoria Land (Antarctica) inferred from the integration of GPS data and geologic setting." Journal of Geophysical Research 115, no. B12: 1.

Review article
Published: 12 October 2009 in Journal of Atmospheric and Solar-Terrestrial Physics
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Ground-based dual-frequency GPS observations can be used to create images of electron density. This is well established for the Arctic ionosphere; here one of the first results is presented for the Antarctic. In this study, the GPS receivers in the Antarctic are supplemented with another GPS receiver onboard CHAMP. The aim of the study is to demonstrate the technique for investigating geophysical events, for example, an ionospheric disturbance period on 11 February 2004. The images have been validated by in-situ measurements from DMSP and CHAMP satellites, as well as Super Dual Auroral Radar Network (SuperDARN) convection patterns, which are able to confirm the location, presence, and transportation of large-scale plasma patches. This study indicates that although the convection still dominates in the high-latitude ionosphere, soft precipitation within the polar cap may play a role in the evolution of the polar patches. It also illustrates the potential for future multi-instrument studies of the Antarctic.

ACS Style

Ping Yin; Cathryn Mitchell; Lucilla Alfonsi; Mike Pinnock; Paul Spencer; Giorgiana De Franceschi; Vincenzo Romano; Patrick Newell; Pierguido Sarti; Monia Negusini; Alessandro Capra. Imaging of the Antarctic ionosphere: Experimental results. Journal of Atmospheric and Solar-Terrestrial Physics 2009, 71, 1757 -1765.

AMA Style

Ping Yin, Cathryn Mitchell, Lucilla Alfonsi, Mike Pinnock, Paul Spencer, Giorgiana De Franceschi, Vincenzo Romano, Patrick Newell, Pierguido Sarti, Monia Negusini, Alessandro Capra. Imaging of the Antarctic ionosphere: Experimental results. Journal of Atmospheric and Solar-Terrestrial Physics. 2009; 71 (17):1757-1765.

Chicago/Turabian Style

Ping Yin; Cathryn Mitchell; Lucilla Alfonsi; Mike Pinnock; Paul Spencer; Giorgiana De Franceschi; Vincenzo Romano; Patrick Newell; Pierguido Sarti; Monia Negusini; Alessandro Capra. 2009. "Imaging of the Antarctic ionosphere: Experimental results." Journal of Atmospheric and Solar-Terrestrial Physics 71, no. 17: 1757-1765.

Book chapter
Published: 13 August 2008 in Geodetic and Geophysical Observations in Antarctica
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Scientific investigations in Antarctica are, for many different reasons, a challenging and fascinating task. Measurements, observations and field operations must be carefully planned well in advance and the capacity of successfully meeting the goals of a scientific project is often related to the capacity of forecasting and anticipating the many different potential mishaps. In order to do that, experience and logistic support are crucial. On the scientific side, the team must be aware of its tasks and be prepared to carry out observations in a hostile environment: both technology and human resources have to be suitably selected, prepared, tested and trained. On the logistic side, nations, institutions and any other organisation involved in the expeditions must ensure the proper amount of competence and practical support. The history of modern Italian Antarctic expeditions dates back to the middle 80’s when the first infrastructures of “Mario Zucchelli Station”, formerly Terra Nova Bay Station, were settled at Terra Nova Bay, Northern Victoria Land. Only a few years later, the first geodetic infrastructures were planned and built. Italian geodetic facilities and activities were, ever since, being constantly maintained and developed. Nowadays, the most remarkable geodetic infrastructures are the permanent Global Positioning System (GPS) station (TNB1) installed at Mario Zucchelli and the GPS geodetic network Victoria Land Network for DEFormation control (VLNDEF) entirely deployed on an area extending between 71ˆS and 76ˆS and 160ˆ E and 170ˆE. These facilities do not only allow carrying out utmost geodetic investigations but also posses interesting capacities on the international multidisciplinary scientific scenario. In order to fully exploit their potentiality, management and maintenance of the infrastructure are crucial; nevertheless, in order to perform high quality scientific research, these abilities must be coupled with the knowledge concerning a proper use and a correct processing of the information that these infrastructures can provide. This work focuses on the different methods that can be applied to process the observations that are performed with GPS technique in Northern Victoria Land, aiming at reaching the highest accuracy of results and assuring the larger significance and versatility of the processing outcomes. Three software were used for the analysis, namely: Bernese v.5.0, Gipsy/Oasis II and Gamit/Globk. The working data sets are (i) the permanent GPS station TNB1 observations continuously performed since 1998 and (ii) the five episodic campaigns performed on the sites of VLNDEF. The two infrastructures can be regarded as neat examples of standard geodetic installation in Antarctica. Therefore, the technological solutions that were adopted and applied for establishing the GPS permanent station and the VLNDEF geodetic network as well as the data processing strategies and the data analysis procedures that were tested on their observation will be illustrated in detail. The results will be presented, compared and discussed. Furthermore, their potentials and role in geodetic research will be carefully described; their versatility will also be highlighted in the foreground of a multidisciplinary Antarctic international scientific activity.

ACS Style

A. Capra; M. Dubbini; A. Galeandro; L. Gusella; A. Zanutta; G. Casula; M. Negusini; L. Vittuari; P. Sarti; F. Mancini; S. Gandolfi; M. Montaguti; G. Bitelli. VLNDEF Project for Geodetic Infrastructure Definition of Northern Victoria Land, Antarctica. Geodetic and Geophysical Observations in Antarctica 2008, 37 -72.

AMA Style

A. Capra, M. Dubbini, A. Galeandro, L. Gusella, A. Zanutta, G. Casula, M. Negusini, L. Vittuari, P. Sarti, F. Mancini, S. Gandolfi, M. Montaguti, G. Bitelli. VLNDEF Project for Geodetic Infrastructure Definition of Northern Victoria Land, Antarctica. Geodetic and Geophysical Observations in Antarctica. 2008; ():37-72.

Chicago/Turabian Style

A. Capra; M. Dubbini; A. Galeandro; L. Gusella; A. Zanutta; G. Casula; M. Negusini; L. Vittuari; P. Sarti; F. Mancini; S. Gandolfi; M. Montaguti; G. Bitelli. 2008. "VLNDEF Project for Geodetic Infrastructure Definition of Northern Victoria Land, Antarctica." Geodetic and Geophysical Observations in Antarctica , no. : 37-72.