High-resolution digital 3D models of Algar do Penico Chamber: limitations, challenges, and potential

M.Sc., Ivo Silvestre; Rodrigues, José; Figueiredo, Mauro; Veiga-Pires, C.

doi:10.5038/1827-806x.44.1.3

Cited by 19 publications

(27 citation statements)

References 12 publications

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“…As the software is not specifically oriented to the analysis of cave morphology, specialized tools have to be used. For more details on methodologies for this issue, the reader is advised to consult works by Roncat et al (2011), Jaillet et al (2013, Cosso et al (2014), Hoffmeister et al (2015), Silvestre et al (2015), or Gallay et al (2015a, b), which exploited commercial software and open-source software for 3-D cave surface modelling. In this manner, the new software tools fill the gap which has emerged when the traditional 2-D geomorphometric approach adopted in GIS hit its limitations in handling 3-D surfaces.…”

Section: Benefits Of Terrestrial Laser Scanning and Geomorphometry Inmentioning

confidence: 99%

“…We tested the Poisson surface reconstruction approach by Khazdan et al (2006). Silvestre et al (2015) used this procedure to model the surface of a cave chamber and identified stalactites based on local minima of the 3-D surface. The Poisson reconstruction of the 3-D surface is based on the observation that the normal field of the boundary of a solid can be interpreted as the gradient of the solid's indicator function.…”

Section: Generating a 3-d Cave Surface Modelmentioning

confidence: 99%

“…It is now possible to integrate 3-D content on the Web directly into the browser without plug-ins or additional components. For example, Silvestre et al (2015) presented an approach in which X3-D, WebGL, and X3-DOM were used to enable online 3-D visualization and navigation of the interior of the Algar do Penico cave, Portugal, in several different Web browsers. Potenziani et al (2015) introduced their 3-D Heritage Online Presenter (3-DHOP), which is an open-source software package for the creation of interactive Web presentations of high-resolution 3-D models.…”

Section: Web-based Tool For Interactive 3-d Visualization and Analysismentioning

confidence: 99%

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Geomorphometric analysis of cave ceiling channels mapped with 3-D terrestrial laser scanning

Gallay

Hochmuth

Kaňuk

et al. 2016

Hydrol. Earth Syst. Sci.

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Abstract. The change of hydrological conditions during the evolution of caves in carbonate rocks often results in a complex subterranean geomorphology, which comprises specific landforms such as ceiling channels, anastomosing half tubes, or speleothems organized vertically in different levels. Studying such complex environments traditionally requires tedious mapping; however, this is being replaced with terrestrial laser scanning technology. Laser scanning overcomes the problem of reaching high ceilings, providing new options to map underground landscapes with unprecedented level of detail and accuracy. The acquired point cloud can be handled conveniently with dedicated software, but applying traditional geomorphometry to analyse the cave surface is limited. This is because geomorphometry has been focused on parameterization and analysis of surficial terrain. The theoretical and methodological concept has been based on twodimensional (2-D) scalar fields, which are sufficient for most cases of the surficial terrain. The terrain surface is modelled with a bivariate function of altitude (elevation) and represented by a raster digital elevation model. However, the cave is a 3-D entity; therefore, a different approach is required for geomorphometric analysis. In this paper, we demonstrate the benefits of high-resolution cave mapping and 3-D modelling to better understand the palaeohydrography of the Domica cave in Slovakia. This methodological approach adopted traditional geomorphometric methods in a unique manner and also new methods used in 3-D computer graphics, which can be applied to study other 3-D geomorphological forms.

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Section: Benefits Of Terrestrial Laser Scanning and Geomorphometry Inmentioning

confidence: 99%

Section: Generating a 3-d Cave Surface Modelmentioning

confidence: 99%

Section: Web-based Tool For Interactive 3-d Visualization and Analysismentioning

confidence: 99%

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Geomorphometric analysis of cave ceiling channels mapped with 3-D terrestrial laser scanning

Gallay

Hochmuth

Kaňuk

et al. 2016

Hydrol. Earth Syst. Sci.

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“…The researchers further their work focusing on 3D analysis by developing algorithm to extract speleothem and delivering the model on web (Silvestre et al, 2015). Similar to the French Les Fraux, the Croatian fortified cave of Kuca, is another location in Europe with abundant remnant of human presence that enlists it one of the European "Karst Underground Protection" project (Kordic et al, 2012).…”

Section: Previous Case Studiesmentioning

confidence: 99%

“…In another development, modern hydrogeologists have realized that 3D information from TLS is a fundamental base data to the study of karst and its geomorphological structure. According to Buchroithner and Gaisecker (2009), calcareous mountains are known for hosting large amount of ground water, so connection between hydrology and climate over time can be analyzed from TLS data (Silvestre et al, 2015). Moreover, having data depicting the shape and volume cavity of a cave will allow projecting water storage capacity.…”

Section: Introductionmentioning

confidence: 99%

A decade of modern cave surveying with terrestrial laser scanning: A review of sensors, method and application development

Oludare¹,

Pradhan²

2016

IJS

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Abstract:During the last decade, the need to survey and model caves or caverns in their correct three-dimensional geometry has increased due to two major competing motivations. One is the emergence of medium and long range terrestrial laser scanning (TLS) technology that can collect high point density with unprecedented accuracy and speed, and two, the expanding sphere of multidisciplinary research in understanding the origin and development of cave, called speleogenesis. Accurate surveying of caves has always been fundamental to understanding their origin and processes that lead to their current state and as well provide tools and information to predict future. Several laser scanning surveys have been carried out in many sophisticated cave sites around the world over the last decade for diverse applications; however, no comprehensive assessment of this development has been published to date. This paper reviews the state-of-the-art three-dimensional (3D) scanning in caves during the last decade. It examines a bibliography of almost fifty high quality works published in various international journals related to mapping caves in their true 3D geometry with focus on sensor design, methodology and data processing, and application development. The study shows that a universal standard method for 3D scanning has been established. The method provides flexible procedures that make it adaptable to suit different geometric conditions in caves. Significant progress has also been recorded in terms of physical design and technical capabilities. Over time, TLS devices have seen a reduction in size, and become more compact and lighter, with almost full panoramic coverage. Again, the speed, resolution, and measurement accuracy of scanners have improved tremendously, providing a wealth of information for the expanding sphere of emerging applications. Comparatively, point cloud processing packages are not left out of the development. They are more efficient in terms of handling large data volume and reduced processing time with advanced and more powerful functionalities to visualize and generate different products.

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Frontier in Three-Dimensional Cave Reconstruction—3D Meshing Versus Textured Rendering

Idrees

Pradhan

2018

Gcec 2017

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Underground caves and their specific structures are important for geomorphological studies. This paper investigates the capabilities of a new modelling approach advanced for true-to-life three-dimensional (3D) reconstruction of cave with full resolution scan relative to 3D meshing. The cave was surveyed using terrestrial laser scanner (TLS) to acquire high resolution scans. The data was processed to generate a 3D-mesh model and textured 3D model using sub-sampled points and full resolution scan respectively. Based on both point and solid surface representation, comparative analysis of the strengths and weaknesses of the two approaches were examined in terms of data processing efficiency, visualization, interactivity and geomorphological feature representation and identification. The result shows that full scan point representation offers advantage for dynamic visualization over the decimated xyz point data because of high density of points and availability of other surface information like point normal, intensity and height which can be visualized in colour scale. For the reconstructed surface, mesh model is better with respect to interactivity and morphometric but 3D rendering shows superiority in visual reality and identification of micro detail of features with high precision. Complementary use of the two will provide better understanding of the cave, its development and processes.

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High-resolution digital 3D models of Algar do Penico Chamber: limitations, challenges, and potential

Cited by 19 publications

References 12 publications

Geomorphometric analysis of cave ceiling channels mapped with 3-D terrestrial laser scanning

Geomorphometric analysis of cave ceiling channels mapped with 3-D terrestrial laser scanning

A decade of modern cave surveying with terrestrial laser scanning: A review of sensors, method and application development

Frontier in Three-Dimensional Cave Reconstruction—3D Meshing Versus Textured Rendering

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