scholarly journals Correlation among Earthwork and Cropmark Anomalies within Archaeological Landscape Investigation by Using LiDAR and Multispectral Technologies from UAV

Drones ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 72
Author(s):  
Diego Ronchi ◽  
Marco Limongiello ◽  
Salvatore Barba
Keyword(s):  
Vegetation Indices ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Buried Structures ◽  
Aerial Photos ◽  
Terrain Model ◽  
Survey Techniques ◽  
Digital Terrain ◽  
Vegetation Maps ◽  
The One

This project aimed to systematically investigate the archaeological remains of the imperial Domitian villa in Sabaudia (Italy), using different three-dimensional survey techniques. Particular attention in the research was paid to the identification and documentation of traces that buried structures left on the surface occupied by the villa, which extended for 46 hectares, an area that was fully covered with structures. Since a dense pine forest was planted during the 1940s and is currently covering the site, this contribution investigates particularly the correlation among the presence of cropmarks, identifiable with the processing of multispectral maps and vegetation indices from RGB images, and earthwork anomalies identified in a Digital Terrain Model (DTM) built, by utilizing a light detection and ranging (LiDAR) flight from an Unmanned Aerial Vehicle (UAV). The study demonstrates how the use of vegetation maps—calculated starting from RGB and multispectral aerial photos—can provide a more expeditious preliminary analysis on the position and extension of areas characterized by the presence of buried structures, but also that, in order to investigate in-depth a context in similar conditions, the most effective approach remains the one based on LiDAR technology. The integration between the two techniques may prove fruitful in limiting the extension of the areas to be investigated with terrestrial survey techniques.

Application of Bentley Power Rail Track Software in the BIM Railway Design

2014 ◽  
Vol 587-589 ◽  
pp. 1091-1094
Author(s):  
Xi Sheng ◽  
Hua Peng Luo ◽  
Ping Wang
Keyword(s):  
Cross Sections ◽  
High Efficiency ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Rail Track ◽  
Terrain Model ◽  
Digital Terrain ◽  
Design Software

Belonging to the Bentley Microstation series which work as one of the BIM platforms, the Bentley Power Rail Track shows huge advantages in the railway design for its visibility, high efficiency, advance, reliability and so on. This paper introduces the way to build the digital terrain model, alignments, cross sections, turnouts and to display the three-dimensional model of the railway for the Bentley Power Rail Track 3D railway design software. It provides application preparation for the BIM railway design and achieves the preliminary exploration of BIM applications. Bentley Power Rail Track proves capable of the BIM railway design.

Research on Algorithm of Delaunay Triangulation Net Interpolating the Best Point

2014 ◽  
Vol 1044-1045 ◽  
pp. 1278-1282
Author(s):  
Xing Guo Qiu ◽  
Zheng Liu
Keyword(s):  
Delaunay Triangulation ◽  
Complex Terrain ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Kriging Interpolation ◽  
Control Points ◽  
Interpolation Algorithm ◽  
Terrain Model ◽  
Digital Terrain ◽  
Technological Tool

Aiming at the folds caused by the sparse data in the process of DTM (Digital Terrain Model), this article proposed a method of interpolating spatial control points based on Delaunay triangulation and Kriging interpolation algorithm. The terrain data of an area with complex terrain in Xianyang was used to construct terrain model according to the proposed algorithm. Experimental results show that the method can finish the interpolation of the terrain denser data quickly and accurately, and it provides an efficient technological tool for building a true three-dimensional terrain model.

scholarly journals BACKPACK MOBILE MAPPING SOLUTION FOR DTM EXTRACTION OF LARGE INACCESSIBLE SPACES

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 473-480
Author(s):  
F. Fassi ◽  
L. Perfetti
Keyword(s):  
Digital Terrain Model ◽  
Small Scale ◽  
Mobile Mapping ◽  
Terrain Model ◽  
Digital Terrain ◽  
Mapping System ◽  
Mobile Mapping System ◽  
The One ◽  
Mapping Solution

<p><strong>Abstract.</strong> The paper presents the case study of the complete 3D survey of the area of the Fort of Pietole in Borgo Virgilio using the Leica Pegasus Backpack wearable Mobile Mapping System (MMS). Surveying the site is challenging because of its complex topology on the one hand (with notably narrow passages) and because of the presence of vegetation on the other. The framework within which this research takes place is the Fort of Pietole survey project that aims at the extraction of the Digital Terrain Model (DTM) of the area and the georeferencing of the fort defensive structures. The requirement of the project is the 3D reconstruction of the whole area at an accuracy that stands between a big scale environmental survey and a small-scale architectonic survey (1&amp;thinsp;:&amp;thinsp;500).</p> <p>The project is the opportunity to discuss the state of the art of wearable MMS, and to test the versatility and accuracy outcomes of the Pegasus Backpack under varying and challenging condition (indoor-outdoor, even-uneven pavement, satellite covered-denied areas) with the ambitious goal to use only the backpack MMS to record all the data from the DTM to the indoor narrow structures.</p>

scholarly journals Evaluation On Different UAV’s Georeferencing Points to Generate Accurate Orthophoto and Digital Terrain Model

2021 ◽  
Vol 18 (2) ◽  
pp. 67
Author(s):  
MUHAMMAD HAFIZ AIZUDDIN BIN MOHD ZAIDI ◽  
Khairul Nizam Tahar
Keyword(s):  
Autonomous Navigation ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Optimum Number ◽  
Terrain Model ◽  
Aerial Photogrammetry ◽  
Digital Terrain ◽  
Ground Control Points ◽  
Waypoint Navigation ◽  
User Friendly

UAV or drone application of autonomy ranging can be divided into several levels, from basic hovering and position over trajectory tracking and waypoint navigation to fully autonomous navigation. This study used the DroneDeploy application for an autonomous flight mission. It is the process of taking photographs from an aircraft or other flying objects with a camera mounted on them to produce a three-dimensional (3D) map from the images captured, including a digital terrain model (DTM) and orthophotos. As for this study, the same output will be generated, but different flight parameter applications were used. Therefore, the study determined the optimum number of ground control points (GCPs) and evaluated the accuracy of the final results for each flight design. Acquired data were processed using the Pix4D modeller software due to the user-friendly factor and faster processing rate offered by the software. The results were analysed, and recommendations were made for future study improvement and to avoid similar problems. This study is useful for the mapping industry to achieve high accuracy results.  Keywords: Aerial photogrammetry, Flight Parameter, UAV apps, DTM, Orthophotos, GCPs

scholarly journals USING REMOTE SENSING AND GIS TO CREATE GEOGRAPHICAL BASES FOR THEMATIC MAPS

2021 ◽  
Vol 26 (5) ◽  
pp. 119-125
Author(s):  
Oyunkhand Byamba ◽  
◽  
Elena L. Kasyanova ◽  
Keyword(s):  
Remote Sensing ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Gis Technology ◽  
Gis And Remote Sensing ◽  
Terrain Model ◽  
Digital Terrain ◽  
Terrain Models ◽  
Triangulation Network ◽  
Eastern Mongolia

The development of science always depends on technological progress. Cartography is rapidly changing and developing with the introduction of new computer technologies, such as GIS and remote sensing of the Earth. Recently, there have been qualitatively new types of cartographic products, in particular 3D terrain models, which in cartography are becoming a universal, optimal and operational method for displaying terrain. The article discusses a method for creating a three-dimensional digital terrain model in the form of an irregular triangulation network based on SRTM data and GIS technology on the example of the Khenti aimag of Eastern Mongolia.

A Method to Calculate Porosity of Loess Based SEM and its Application

2012 ◽  
Vol 256-259 ◽  
pp. 179-182
Author(s):  
Peng Ran Song ◽  
Chang Ming Wang
Keyword(s):  
Three Dimensional ◽  
Digital Terrain Model ◽  
Sem Images ◽  
Preparation Methods ◽  
Terrain Model ◽  
Double Peaks ◽  
Digital Terrain ◽  
Structure Changes ◽  
Before And After ◽  
Large Distribution

Research the structure changes before and after collapsible experiment of loess microstructure. Using artificial preparation methods prepared different moisture samples of Liaoxi loess. Do collapsible test and Scanning electron microscope test with the prepared samples. According to Digital Terrain Model theory, three-dimensional porosities were calculated based on gray scale information from the SEM images extracted by MATLAB. The results are shown following as: the microstructure of loess samples is getting dense, the average number of pore of samples obviously increases and the pore area decreases after the sample is collapsed. The distribution before and after the collapsibility of gray value has certain regularity. The before one has double peaks, large distribution. The after one has single peak, concentrate distribution and meets normal distribution.

scholarly journals AN EXPERIMENT ON FORMATION OF A SPATIAL BASIS FOR THREE-DIMENSIONAL MODELING OF TERRITORY

2020 ◽  
Vol 6 (2) ◽  
pp. 152-157
Author(s):  
Aylash A. Shannaa ◽  
Ekaterina N. Kulik
Keyword(s):  
Aerial Photography ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Technological Scheme ◽  
Terrain Model ◽  
Three Dimensional Modeling ◽  
Digital Terrain ◽  
Dimensional Modeling

The article discusses the technology for creating the spatial basis of a digital terrain model, the data for which was obtained by aerial photography of the territory. Also, as part of the study, the technological scheme of the stereophotogrammetric method was analyzed and its practical testing was carried out.

The generalized gravity anomaly: Endoscopic microgravity

Geophysics ◽  
1991 ◽  
Vol 56 (5) ◽  
pp. 712-723 ◽  
Author(s):  
J. Lakshmanan
Keyword(s):  
Underground Structure ◽  
Bouguer Anomaly ◽  
Digital Terrain Model ◽  
Gravity Anomalies ◽  
Underground Structures ◽  
Terrain Model ◽  
Digital Terrain ◽  
Generalized Inversion ◽  
Gravity Measurements ◽  
The One

Various underground 3-D gravity surveys have necessitated a generalization of the usual gravity corrections and of the Bouguer anomaly. The method presented here compares raw, time‐dependent gravity measurements, to a model’s total theoretical field, including known fields: moon, sun, 1967 Reference Ellipsoid, oceans; partially known fields: due to a single digital terrain model of known geometry but of unknown densities; and unknown fields due to underground structures of unknown shapes and of unknown densities. For a single‐density model, the corresponding first‐degree residual is close in concept to the Bouguer anomaly. To best determine underground structure, generalized inversion then leads to determination of the one or several densities and of one or several “regional” parameters, which minimize residuals. The suggested method is mainly advantageous in special types of gravity surveys, such as rugged terrain, or in the case of underground surveys, where conventional corrections, with a preset terrain density can possibly lead to substantial errors. Two field examples are developed (1) the Cheops pyramid survey, where the processing of gravity measurements inside, above, and around the pyramid led to an evaluation of the structure’s overall density and of density changes in the structure; and (2) the Coche hydroelectric tunnel in the Alps, where the method leads to a 3-D model explaining the very strong gravity anomalies observed in the tunnel and on the mountain above it.

Geoarchaeological mapping of Stone Age sites and mineral outputs of Titovskaya Sopka (Eastern Transbaikalia): a practical aspect

2020 ◽  
Vol 26 (9) ◽  
pp. 13-23
Author(s):  
P. Moroz ◽  
◽  
K. Kurganovich ◽  
M. Bosov ◽  
G. Yurgenson ◽  
...  
Keyword(s):  
Raw Materials ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Contact Metamorphism ◽  
Practical Implementation ◽  
Mineral Raw Materials ◽  
Terrain Model ◽  
Dense Cloud ◽  
Digital Terrain ◽  
Eastern Transbaikalia

The practical implementation of the possibilities of using unmanned aerial vehicles (UAVs) in carrying out geoarchaeological mapping of the Sukhotinsky geoarchaeological region is shown. The object of the study is the Sukhotinsky geoarchaeological region (Eastern Transbaikalia), associated with the source of mineral raw materials - the Titovskaya Sopka paleovolcano. The aim of the study is to create orthophotomap and digital terrain model specified. The objectives of the study included geoarchaeological mapping of the territory of the study area using modern hardware and software methods using algorithms for reconstructing a three-dimensional scene from photographs, such as structure from motion (SfM), adapted to the tasks of geoarcheology and mapping of volcanics, as well as the products of their contact metamorphism; coordination of ground control points’ network and marking of their location in a way that allows them to be identified from photographs taken by UAVs; realization of aerial photography of the area under consideration, using UAVs;implementation of algorithms for photogrammetric processing of images using the SfM method with obtaining a spatially-oriented dense cloud of terrain points; post-processing of a dense cloud of points with obtaining a three-dimensional terrain model and a high spatial resolution orthophotomap. The relevance of the work lies in the practical implementation of modern GNNS technologies using an unmanned aerial vehicle for mapping geoarchaeological objects. Analysis and interpretation of high-resolution images taken from UAVs and other digital and cartographic materials, processing and digitization of images were taken as research methods. An orthophotomap and a digital terrain model were created and analyzed. Areas of microrelief change were revealed. The theoretical and practical significance of the study consists in creating an orthophotomap and a digital terrain model of the Sukhotinsky geoarchaeological region using modern hardware and a UAV, representing a digital geoarchaeological mapping of archaeological sites, including all hypsometric levels and outcrops of mineral raw materials on an area of 2,4 km²

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