Using laser scanning and digital photogrammetry for creation of virtual geological outcrops: case studies from the west of Ukraine

Bubniak, Іhor; Bubniak, Andrij; Gavrilenko, O. D.; Nikulishyn, V. I.; Golubinka, I. I.

doi:10.3997/2214-4609.201902078

Cited by 3 publications

(1 citation statement)

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“…Successful triangulation of feature coordinates results in a sparse point cloud which also contains information about the camera specifications like geometry, optical information, and spatial orientation (Chesley et al, 2017;Bilmes et al, 2019). In the final stages of the workflow, a colorized dense point cloud is obtained once the tangential and spherical distortion are removed from the mathematically oriented images (Bilmes et al, 2010;Bistacchi et al, 2015;Chesley et al, 2017;Bubniak et al, 2019). As a result of the continued growth in use of SfM, the combination of drones and SfM in the geosciences has provided the ability to generate high-resolution DOMs and digital terrain models (DTMs) which have proven useful in many different subfields (Chesley et al, 2017;Bilmes et al, 2019).…”

Section: Structure From Motion Photogrammetrymentioning

confidence: 99%

Sources of Uncertainty in Remote Stratigraphic Observations

Marlow¹,

Provided²,

Davatzes³

et al. 2020

Geological Society of America Abstracts With Programs

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Small UAVs (drones) are increasingly useful for field data acquisition in the geosciences. Drone images and videos can be processed via digital photogrammetry to produce a 3D digital outcrop model (DOM). DOMs provide opportunities to "return" to an outcrop after fieldwork is complete, collect data from outcrops that are inaccessible, or may even provide opportunities to radically increase data volume of geometric characterizations of geological structures. Our study focuses on understanding the limitations of digital measurements and interpretations used to create stratigraphic columns by comparing 2D and 3D results to traditional stratigraphic descriptions and measurements from fieldwork.In this study, a drone collected photos and videos of a well-exposed section of the Palm Spring Formation in the Mecca Hills, California, which is divided into lower and upper units by an angular unconformity and a change in overall texture. In the v

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Section: Structure From Motion Photogrammetrymentioning

confidence: 99%

Sources of Uncertainty in Remote Stratigraphic Observations

Marlow¹,

Provided²,

Davatzes³

et al. 2020

Geological Society of America Abstracts With Programs

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The Sukil River valley: a natural geological laboratory (case studies from the Ukrainian Carpathians)

Bubniak

Vikhot

et al. 2022

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In this paper we present a brief geological description and interesting objects of the Sukil River Valley, located in the Ivano-Frankivsk region in the western part of Ukraine. Here, in a small area, different types of rocks are exposed. The area is rich in various structural objects, e.g. joints, small faults, different types of folds, duplexes, clastic dykes. Two outcrops of folds in the Cretaceous deposits in the village of Bukivets are unique geosites. Also in the city of Bolekhiv are the ruins of a salt factory. We describe the types of research conducted in this natural laboratory. Most research concerns structural geology. Geological phenomena are studied using both classical approaches and the latest technologies. Electronic compasses were widely used in the study of mesostructures. For the first time, balanced geological sections were built for the territory of the Ukrainian Carpathians both for outcrops and for the entire Sukil River Valley. Ground-based laser scanning was used for detailed mapping of folds from Bukivets. Subsequently, the exposure began to be studied by photogrammetric method with UAV. The result is the construction of virtual geological outcrops, which are widely used in the educational process. The urgency of creating virtual tours became apparent during the covid pandemic. Also, these models were used to create the geotourism route of the Geo-Carpathians. These models are used in the educational process of the Structural Geology of the Carpathians, in the geological training of students in Earth Sciences, in excursions for different types of Ukrainian and international conferences, for high school students, and anyone interested in Geology. Also, they were used to create the geotourism route of the Geo-Carpathians.

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3d model of Medova cave, Lviv

Bubniak,

Oliinyk,

Tsikhon

et al. 2023

ISTCGCAP

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The purpose of this article is to present and provide a detailed analysis of the 3D model of the Medova Cave in Lviv, created using laser scanning technology. The main objectives include revealing the accuracy and detailing the obtained model, as well as determining its potential applications in various fields such as geological research, scientific exploration, cultural heritage, and tourism. Additionally, the article aims to emphasize the importance and advantages of using laser scanning for creating precise and realistic 3D cave models, opening new possibilities for the study and preservation of natural unique formations. Method. The article describes the methodology used to create a 3D model of the Medova Cave, which involves several key steps. Firstly, a thorough reconnaissance of the cave is conducted to identify technical and logistical aspects such as temperature, humidity, movement restrictions, and lighting that are necessary for the scan. Next, ground-based laser scanning is employed, proving effective in conditions of complete darkness and limited space, to ensure accurate data collection regarding the cave's geometry. Reflective markers are strategically placed inside the cave before scanning, facilitating efficient scanning and alignment of scans. Specialized equipment such as GNSS receivers (Trimble R7) and ground-based laser scanners (Faro Focus 3D 120) are utilized for data collection. Software tools like Faro Scene are used for stitching together scans into a unified 3D point cloud model during data processing. Finally, the accuracy of marker connections is analyzed to ensure high-quality registration, and the 3D model is constructed. Detailed 3D models, including textured models and cross-sections for visualizing the internal structure of the cave, were constructed using software such as Move. Results. The research on the Medova Cave, employing ground-based laser scanning, yielded an accurate and detailed 3D model of the cave. This model opens new perspectives for geological and geomorphological studies, tourism development, and cultural heritage preservation. The use of advanced scanning technologies allowed for a comprehensive representation of the cave's geometric features, considering its complex structure and varied dimensions. Scientific novelty and practical significance. The creation of the 3D model of the Medova cave using laser scanning signifies progress in cave geometry studies. The innovation lies in the utilization of advanced laser scanning technologies to ensure a detailed representation of the cave's geometric features, accounting for its complex structure and diverse dimensions. The novelty also lies in the development of a data collection and processing strategy in conditions of complete darkness and limited cave space, resulting in an accurate and realistic 3D model. Practically, the 3D model of the Medova Cave serves as a crucial tool for geological and geomorphological research and the exploration of unique natural formations. The model opens new opportunities for tourism development, where virtual cave exploration can provide a unique experience for visitors. Creating this 3D model is a significant step in preserving and documenting cultural heritage, contributing to the scientific and cultural development of the region, and providing access to unique objects for researchers and the public.

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Using laser scanning and digital photogrammetry for creation of virtual geological outcrops: case studies from the west of Ukraine

Cited by 3 publications

References 0 publications

Sources of Uncertainty in Remote Stratigraphic Observations

Sources of Uncertainty in Remote Stratigraphic Observations

The Sukil River valley: a natural geological laboratory (case studies from the Ukrainian Carpathians)

3d model of Medova cave, Lviv

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