3D modelling of laser scanned and photogrammetric data for digital documentation: the Mosteiro da Batalha case study

Oliveira, Adriano Q. de; Oliveira, João Fradinho; Pereira, João Madeiras; Araújo, Bruno; Boavida, João

doi:10.1007/s11554-012-0242-0

Cited by 22 publications

(11 citation statements)

References 15 publications

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“…measurement noise or data post-processing) has been parameterized in this study. Surface models of point clouds are an adequate solution for surface objects such as cooling towers [40], dams [41][42], or tunnels [43]. The comparison of periodic surface models of an object in order to detect dislocation is a recognised procedure in landslide monitoring [44][45] and determining the progress of erosion of rocky cliffs [46][47][48].…”

Section: Mesh Surface Analysis (3)mentioning

confidence: 99%

TLS Measurement during Static Load Testing of a Railway Bridge

Gawronek¹,

Makuch²

2019

IJGI

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Terrestrial laser scanning (TLS) technology has become increasingly popular in investigating displacement and deformation of natural and anthropogenic objects. Regardless of the accuracy of deformation identification, TLS provides remote comprehensive information about the measured object in a short time. These features of TLS were why TLS measurement was used for a static load test of an old, steel railway bridge. The results of the measurement using the Z+F Imager 5010 scanner and traditional surveying methods (for improved georeferencing) were compared to results of precise reflectorless tacheometry and precise levelling. The analyses involved various procedures for the determination of displacement from 3D data (black & white target analysis, point cloud analysis, and mesh surface analysis) and the need to pre-process the 3D data was considered (georeferencing, automated filtering). The results demonstrate that TLS measurement can identify vertical displacement in line with the results of traditional measurements down to ±1 mm.

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Section: Mesh Surface Analysis (3)mentioning

confidence: 99%

TLS Measurement during Static Load Testing of a Railway Bridge

Gawronek¹,

Makuch²

2019

IJGI

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“…Hallermann et al (2015) used 1600 highresolution aerial images to generate a 3D model of the Rappbode Dam, the highest dam in Germany, as well as an orthomosaic image of the downstream face. In the study by Oliveira et al (2014), an orthomosaic image of the downstream face of a concrete dam, located in Portugal, was generated using 99 UAVacquired images. Later, a defect map was manually generated by overlaying the marked anomalies on the orthomosaic image in AutoCAD.…”

Section: Prior Work On Modern Dam Inspectionmentioning

confidence: 99%

Utilizing UAV and 3D Computer Vision for Visual Inspection of a Large Gravity Dam

Khaloo

Lattanzi

Jachimowicz

et al. 2018

Front. Built Environ.

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Dams are a critical infrastructure system for many communities, but they are also one of the most challenging to inspect. Dams are typically very large and complex structures, and the result is that inspections are often time-intensive and require expensive, specialized equipment and training to provide inspectors with comprehensive access to the structure. The scale and nature of dam inspections also introduce additional safety risks to the inspectors. Unmanned aerial vehicles (UAV) have the potential to address many of these challenges, particularly when used as a data acquisition platform for photogrammetric three-dimensional (3D) reconstruction and analysis, though the nature of both UAV and modern photogrammetric methods necessitates careful planning and coordination for integration. This paper presents a case study on one such integration at the Brighton Dam, a large-scale concrete gravity dam in Maryland, USA. A combination of multiple UAV platforms and multi-scale photogrammetry was used to create two comprehensive and high-resolution 3D point clouds of the dam and surrounding environment at intervals. These models were then assessed for their overall quality, as well as their ability to resolve flaws and defects that were artificially applied to the structure between inspection intervals. The results indicate that the integrated process is capable of generating models that accurately render a variety of defect types with sub-millimeter accuracy. Recommendations for mission planning and imaging specifications are provided as well.

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“…Additionally, they presented a test case where an orthophoto is created for the documentation of the frieze of the Roman arch of Augusto in Susa, Italy. Oliveira et al [70] created orthomosaics from façades for the documentation of the general outlay and detailing. In addition, they modeled cracks and deteriorations on the face of dam structures.…”

Section: Orthomosaicmentioning

confidence: 99%

An Overview of Innovative Heritage Deliverables Based on Remote Sensing Techniques

et al. 2018

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The documentation and information representation of heritage sites is rapidly evolving. With the advancements in remote sensing technology, increasingly more heritage projects look to integrate innovative sensor data into their workflows. Along with it, more complex analyses have become available which require highly detailed inputs. However, there is a gap in the current body of knowledge of how to transfer the outputs from innovative data acquisition workflows to a set of useful deliverables that can be used for analysis. In addition, current procedures are often restricted by proprietary software or require field specific knowledge. As a result, more data are being generated in heritage projects but the tools to process them are lacking. In this work, we focus on methods that convert the raw information from the data acquisition to a set of realistic data representations of heritage objects. The goal is to present the industry with a series of practical solutions that integrate innovative technologies but still closely relate to the current heritage documentation workflows. An extensive literature study was performed discussing the different methods along with their advantages and opportunities. In the practical study, four deliverables were defined: the use of orthomosaics, web-based viewers, watertight mesh geometry and content for serious games. Each section is provided with a detailed overview of the process and realistic test cases that heritage experts can use as a basis for their own applications. The implementations are applicable to any project and provide the necessary information to update existing documentation workflows. Overall, the ideology is to increase the access to innovative technologies, better communicate the data to the different stakeholders and improve the overall usefulness of the information.

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3D modelling of laser scanned and photogrammetric data for digital documentation: the Mosteiro da Batalha case study

Cited by 22 publications

References 15 publications

TLS Measurement during Static Load Testing of a Railway Bridge

TLS Measurement during Static Load Testing of a Railway Bridge

Utilizing UAV and 3D Computer Vision for Visual Inspection of a Large Gravity Dam

An Overview of Innovative Heritage Deliverables Based on Remote Sensing Techniques

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