An efficient method for rendering linear symbols on 3D terrain using a shader language

She, Jinhua; Li, Chuang; Li, Jiaqi; Wei, Qiujun

doi:10.1080/13658816.2017.1394463

Cited by 9 publications

(6 citation statements)

References 30 publications

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“…Methods for automated visualization of cartographic symbols are the topic of several works [4,[24][25][26][27][28]. This part deals with symbol selection from a suitable database, their positioning and plotting in a map face using automated tools.…”

Section: Related Workmentioning

confidence: 99%

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Method for Cartographic Symbols Creation in Connection with Map Series Digitization

Bartoněk

Andělová

2022

IJGI

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The article addresses the issue of the unification of cartographic symbols in terms of graphics (visual) and interpretation in an international context. The motivation is the ongoing digitization of processes in the conditions of Industry 4.0, especially Construction 4.0, where geodesy and cartography have their irreplaceable share. The aim was both to design uniform cartographic symbols for the description of geographical objects on the map and to design a general method for the description of unified cartographic symbols so that it is independent of specific applications. The authors compared the symbols used in the map works of the Czech Republic and neighboring countries that are members of the EU and proposed a formal description of the graphics properties of the symbols, which is based on a general mathematical model. The description takes the form of a text string, and a Python algorithm was built to render the symbol and implemented in the QGIS environment. The article also presents a comparison of some cartographic symbols used in the Czech Republic and in selected EU countries and a proposal for their unification. The motivation is the effort to unify the cartographic language within the EU. The problem is in accordance with the INSPIRE directive (seamless map of Europe) at the international level and with the Digital Czechia 2018+ strategy at the national level.

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Section: Related Workmentioning

confidence: 99%

“…The proposed method is also inspirational for the topic solved in this article. An effective method for linear cartographic symbols depiction in 3D is described in the paper [26]. It is about an acceleration algorithm for GPU (Graphics Processing Unit).…”

Section: Related Workmentioning

confidence: 99%

Method for Cartographic Symbols Creation in Connection with Map Series Digitization

Bartoněk

Andělová

2022

IJGI

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“…Multiple vertices are acquired after the intersection of the fracture and the triangulation: A, D, C, E, and B. The superposition and intersection of vector graphics is a common algorithm in the fields of computational geometry and GIS, and many mature solutions have been proposed [54][55][56]. This study focuses on Liu's algorithm [56] for realizing geometric figure intersections; therefore, the precise stages are not repeated.…”

Section: D Vector Graphics Reconstructionmentioning

confidence: 99%

3D Quantitative Characterization of Fractures and Cavities in Digital Outcrop Texture Model Based on Lidar

et al. 2022

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The combination of lidar and digital photography provides a new technology for creating a high-resolution 3D digital outcrop model. The digital outcrop model can accurately and conveniently depict the surface 3D properties of an outcrop profile, making up for the shortcomings of traditional outcrop research techniques. However, the advent of digital outcrop poses additional challenges to the 3D spatial analysis of virtual outcrop models, particularly in the interpretation of geological characteristics. In this study, the detailed workflow of automated interpretation of geological characteristics of fractures and cavities on a 3D digital outcrop texture model is described. Firstly, advanced automatic image analysis technology is used to detect the 2D contour of the fractures and cavities in the picture. Then, to obtain an accurate representation of the 3D structure of the fractures and cavities on the digital outcrop model, a projection method for converting 2D coordinates to 3D space based on geometric transformations such as affine transformation and linear interpolation is proposed. Quantitative data on the size, shape, and distribution of geological features are calculated using this information. Finally, a novel and comprehensive automated 3D quantitative characterization technique for fractures and cavities on the 3D digital outcrop texture model is developed. The proposed technology has been applied to the 3D mapping and quantitative characterization of fractures and cavities on the outcrop profile for the Dengying Formation (second member), providing a foundation for profile reservoir appraisal in the research region. Furthermore, this approach may be extended to the 3D characterization and analysis of any point, line, and surface objects derived from outcrop photos, hence increasing the application value of the 3D digital outcrop model.

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“…The comparison of these three algorithms is shown in the table 2 (She et al, 2018). From the comparison in the table, it can be seen that the stencil shadow method has low memory usage and high rendering efficiency, and is a more ideal terrain-draped vector rendering algorithm for this paper.…”

Section: Terrain-draped Vector Renderingmentioning

confidence: 99%

3d Gis Based Long-Distance Project Construction Progress Visualization

Wen²,

Ding

et al. 2022

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. The construction progress of a long-distance project can generally be reflected by the percentage of the total length of the segmented project on the main line to the total length of the line. However, the way to express the construction progress based on the percentage is not intuitive enough and it is difficult to reflect the segmented project. Insufficient progress differences. This paper proposes a 3DGIS-based visualization method of long-distance project construction progress. Through regular project construction progress report, the completed line can be automatically generated. At the same time, the overall and local construction progress can be visually expressed through the superimposed display with the main line of the project and the three-dimensional terrain. The experiment combined with the engineering example of the Kunming section of Central Yunnan Water Diversion Project shows the visualization effect of the excavation progress of the water conveyance tunnel, and verifies the effectiveness of the method in this paper.

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An efficient method for rendering linear symbols on 3D terrain using a shader language

Cited by 9 publications

References 30 publications

Method for Cartographic Symbols Creation in Connection with Map Series Digitization

Method for Cartographic Symbols Creation in Connection with Map Series Digitization

3D Quantitative Characterization of Fractures and Cavities in Digital Outcrop Texture Model Based on Lidar

3d Gis Based Long-Distance Project Construction Progress Visualization

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