scholarly journals ACCURACY OF 3D (THREE-DIMENSIONAL) TERRAIN MODELS IN SIMULATIONS

2016 ◽  
Vol 1 (1) ◽  
pp. 30-33 ◽  
Author(s):  
Canan Yemenicioglu ◽  
Sinasi Kaya ◽  
Dursun Zafer Seker
2014 ◽  
Vol 687-691 ◽  
pp. 4101-4104
Author(s):  
Xi Zhe Peng

Large area real terrain modeling is the key technology in visual simulation system. This thesis discusses the terrain modeling technology based on the GeoTIFF data, which transform the GeoTIFF data to DEM using the Global Mapper. And then, the three dimensional terrain models are established through Creator environment, the real terrain modeling is implemented quickly.


2014 ◽  
Vol 20 (5) ◽  
pp. 422-430 ◽  
Author(s):  
Sanat Agrawal ◽  
Deon J. de Beer ◽  
Yashwant Kumar Modi

Purpose – This paper aims to convert surface data directly to a three-dimensional (3D) stereolithography (STL) part. The Geographic Information Systems (GIS) data available for a terrain are the data of its surface. It doesn’t have information for a solid model. The data need to be converted into a three-dimensional (3D) solid model for making physical models by additive manufacturing (AM). Design/methodology/approach – A methodology has been developed to make the wall and base of the part and tessellates the part with triangles. A program has been written which gives output of the part in STL file format. The elevation data are interpolated and any singularity present is removed. Extensive search techniques are used. Findings – AM technologies are increasingly being used for terrain modeling. However, there is not enough work done to convert the surface data into 3D solid model. The present work aids in this area. Practical implications – The methodology removes data loss associated with intermediate file formats. Terrain models can be created in less time and less cost. Intricate geometries of terrain can be created with ease and great accuracy. Social implications – The terrain models can be used for GIS education, educating the community for catchment management, conservation management, etc. Originality/value – The work allows direct and automated conversion of GIS surface data into a 3D STL part. It removes intermediate steps and any data loss associated with intermediate file formats.


2021 ◽  
Vol 14 ◽  
pp. 63-70
Author(s):  
Andreas Bürgi

Among the processes of “conquering, developing and appropriating mountains” is occupied by the emergence of mountain topography. In the eighteenth century raised relief, as a terrain model, played one of the most important roles in this process. This was a period when more reliable topographic data began to be collected on the basis of measurements carried out across the Alps. Possibilities of their cartographic representation were limited at the time. A graphic method for presenting orthogonal projection by means of contour curves was not invented until the nineteenth century. Before that three-dimensional terrain models were the only way to correctly represent various levels of landscape. Terrain models were accepted at the time as the best method for presenting mountain landscapes. The first attempt to carry out a comprehensive measurement of the Alps over a vast area of a continuous mountain range and represent it on a low relief was made in 1786 and concerned an area in central Switzerland around Lake Lucerne. At that time Franz Ludwig Pfyffer von Wyher, an officer in French service, became famous for advanced surveying techniques and terrain models, both civilian and military. His famous relief depicts around one-tenth of today’s Switzerland, with two-thirds of the area encompassing the Alps and foot of the Alps. From that moment on other authors began to create their models of Alpine landscape. These reliefs were appreciated by contemporary naturalists, especially those studying the Alps, because they enabled them to view the complex topography of the range, which had been impossible before. They drew attention to a number of natural and geological phenomena, and made it possible to come up with new findings relating to the following questions: At what altitude should the snow line be placed? Where is the boundary of vegetation? Where do coniferous forests begin? Where is the line of glaciers? What is the structure of the mountains? Obviously, they were not sufficient to provide all answers to the above questions, but thanks to a “bird’s eye” perspective they made it possible to place special studies of the various disciplines within a broader context, both with regard to the relevant subject matter and between disciplines.


Author(s):  
Oyunkhand Byamba ◽  
◽  
Elena L. Kasyanova ◽  

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.


1992 ◽  
Vol 156 ◽  
pp. 63-67
Author(s):  
O Humlum

The application of multi-model photogrammetry to steep cliff faces is described and examples given of the manipulation of the digitised data to produce three-dimensional terrain models, and by using other software models to estimate surface radiation balance.


2020 ◽  
Vol 962 (8) ◽  
pp. 58-64
Author(s):  
A.F. Varfolomeev ◽  
E.A. Kovalenko ◽  
V.F. Manukhov ◽  
L.G. Kalashnikova

In recent years, there have been qualitative changes in surveying associated with the use of robotic systems, such as unmanned aerial vehicles. Currently, traditional geodetic and topographic technologies are giving way to high-precision and high-performance systems using robotics. The technology of aerial photography from drones for mapping territories, operational monitoring linear structures, construction sites, as well as for engineering and underground surveys, solving cadastral matters, building realistic three-dimensional terrain models, etc., is gaining more and more popularity in the world. The transition to new technologies entails restructuring not only the methods of determining coordinates, but also the stages of pre-design and design work. The authors describes the capabilities of geographic information systems for automating some stages of field geodetic data cameral processing obtained through using unmanned aircraft. As a result of the study, it was discovered that the marks of the earth’s surface, read from the constructed digital map, are in good agreement with those obtained as a result of the ground-based geodetic survey.


2016 ◽  
Vol 165 ◽  
pp. 1873-1879
Author(s):  
Vladimir Anisimov ◽  
Kseniia Malykh ◽  
Aleksandr Anisimov ◽  
Arkadii Edigarian

2020 ◽  
Vol 6 (1) ◽  
pp. 205-209
Author(s):  
Natalya V. Lang ◽  
Maria M. Shlyakhova

The article discusses the concept of three-dimensional modeling, shows the main areas of application of 3D models in the modern world and their significance for humans. The main advantages of 3D models in comparison with a two-dimensional model are described. Shows which software products are used to create 3D terrain models.


2017 ◽  
Vol 1 (1) ◽  
pp. 11
Author(s):  
Dámari Melían Díaz ◽  
Carlos Carbonell Carrera ◽  
José Luis Saorín Pérez ◽  
Jorge De la Torre Cantero ◽  
Norena Martín Dorta

ResumenEn educación superior, para las titulaciones de ingeniería y arquitectura es precisa la adquisición y desarrollo de competencias como la creatividad y la visión espacial. La competencia espacial se puede desarrollar mediante la realización de ejercicios y la creatividad mejora, si el diseño de los ejercicios permite múltiples soluciones. La comprensión del relieve topográfico es necesaria para la integración de proyectos de arquitectura e ingeniería en el entorno. Sin embargo, en la formación universitaria se han detectado carencias para la interpretación de las formas del relieve. Las maquetas de terreno, pueden ayudar a suplir esta carencia. La aparición de tecnologías de fabricación digital de bajo coste permiten la creación de maquetas de terreno y su incorporación en la docencia reglada. En este artículo se presentan los resultados de dos experiencias. En la primera, llevada a cabo durante el curso 2015-16 con 33 alumnos universitarios, se realizan maquetas topográficas utilizando secciones apiladas, con el objetivo de mejorar la interpretación tridimensional de las formas del terreno. La segunda parte de la experiencia, llevada a cabo durante el curso 2016-17 se realiza con alumnos de Máster. Se trata de una validación preliminar, con pocos alumnos, en la que se pretende incorporar aspectos creativos a la realización de maquetas de terrenos. Para medir la variación de la competencia creativa en los alumnos se utiliza el Test de Abreacción de la Creatividad (TAEC), antes y después de la experiencia.AbstractIn higher education, engineering and architecture degrees require the acquisition and development of skills such as creativity and spatial ability. Space competence can be developed by performing exercises and the creativity improves, if the design of the exercises allows multiple solutions. The understanding of topographic relief is necessary for the integration of architectural and engineering projects in the environment. However, in the university context deficiencies have been detected for the interpretation of the relief forms. Land models can help to fill this gap. The emergence of low cost digital manufacturing technologies allows the creation of terrain models and their incorporation for teaching. This article presents the results of two experiences. In the first one, carried out during the 2015-16 academic year with 33 university students, topographic models are made using stacked sections, with the aim of improving the three-dimensional interpretation of the terrain forms. The second part of the experience, performed during the 2016-17 course is carried out with Master's students. This is a preliminary validation, with few students, which seeks to incorporate creative aspects to the realization of land models. To measure the variation of creative competence in students, the Creativity Abreaction Test (TAEC) is used, before and after the experience.


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