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.

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.

scholarly journals DTM GENERATION THROUGH UAV SURVEY WITH A FISHEYE CAMERA ON A VINEYARD

2018 ◽  
Vol XLII-2 ◽  
pp. 983-989 ◽  
Author(s):  
G. Ronchetti ◽  
D. Pagliari ◽  
G. Sona
Keyword(s):  
Precision Agriculture ◽  
Reference Model ◽  
Digital Terrain Model ◽  
Kriging Interpolation ◽  
Terrain Model ◽  
Digital Terrain ◽  
Ground Control Points ◽  
Agricultural Applications ◽  
Aerial Vehicle ◽  
Fisheye Camera

Precision agriculture recommends a sustainable employment of nutrients and water, according to the site-specific crop requirements. In this context, the knowledge of soil characteristics allows to appropriately manage resources. Even the topography can influence the spatial distribution of the water on a field. This work focuses on the production of high-resolution Digital Terrain Model (DTM) in agriculture by photogrammetric processing fisheye images, acquired with very light Unmanned Aerial Vehicle (UAV). Particular attention is given to the data processing procedures and to the assessment of the quality of the results, considering the peculiarity of the acquired images. An experimental test has been carried out on a vineyard located in Monzambano, Northern Italy, through photogrammetric survey with Parrot Bebop 2 UAV. It has been realized at the end of the vegetation season, to investigate the ground without any impediment due to the presence of leaves or branches. In addition, the survey has been used for evaluating the performance of Bebop fisheye camera in viticulture. Different flight strategies have been tested, together with different Ground Control Points (GCPs) and Check Points (CPs) configurations and software packages. The computed DTMs have been compared with a reference model obtained through Kriging interpolation of GNSS-RTK measurements. Residuals on CPs are of the order of 0.06 m, for all the considered scenarios, that for agricultural applications is by far sufficient. The photogrammetric DTMs show a good agreement with the reference one.

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.

scholarly journals Kriging Method Optimization for the Process of DTM Creation Based on Huge Data Sets Obtained from MBESs

Geosciences ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 433 ◽  
Author(s):  
Maleika Wojciech
Keyword(s):  
Spatial Data ◽  
Moving Average ◽  
Digital Terrain Model ◽  
Computation Time ◽  
Fixed Number ◽  
Kriging Interpolation ◽  
Computational Time ◽  
Kriging Method ◽  
Terrain Model ◽  
Digital Terrain

The paper presents an optimized method of digital terrain model (DTM) estimation based on modified kriging interpolation. Many methods are used for digital terrain model creation; the most popular methods are: inverse distance weighing, nearest neighbour, moving average, and kriging. The latter is often considered to be one of the best methods for interpolation of non-uniform spatial data, but the good results with respect to model’s accuracy come at the price of very long computational time. In this study, the optimization of the kriging method was performed for the purpose of seabed DTM creation based on millions of measurement points obtained from a multibeam echosounder device (MBES). The purpose of the optimization was to significantly decrease computation time, while maintaining the highest possible accuracy of created model. Several variants of kriging method were analysed (depending on search radius, minimum of required points, fixed number of points, and used smoothing method). The analysis resulted in a proposed optimization of the kriging method, utilizing a new technique of neighbouring points selection throughout the interpolation process (named “growing radius”). Experimental results proved the new kriging method to have significant advantages when applied to DTM estimation.

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.

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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