Results 11 to 20 of about 28,266 (254)

The derivation of skeleton lines for terrain features [PDF]

Geo-Spatial Information Science, 2002
The geometric and physical analysis methods are conventional methods for the derivation of skeleton lines in the fields of cartography, digital photogrammetry, and related areas. This paper proposes a stepwise approach that uses the physical analysis method in the first stage and the geometric analysis method in the subsequent stage.
Huang Peizhi, Poh-Chin Lai
exaly   +2 more sources

Reconstructing high-resolution DEMs from 3D terrain features using conditional generative adversarial networks

International Journal of Applied Earth Observations and Geoinformation
High-resolution Digital Elevation Models (DEMs) are essential for precise geographic analysis. However, obtaining high-resolution DEMs in regions with dense vegetation, complex terrain, or satellite imagery voids presents substantial challenges.
Mengqi Li, Wen Dai, Guojie Wang, Bo Wang, Kai Chen, Yifei Gao, Solomon Obiri Yeboah Amankwah   +6 more
doaj   +3 more sources

Comparison of DEM Super-Resolution Methods Based on Interpolation and Neural Networks

Sensors, 2022
High-resolution digital elevation models (DEMs) play a critical role in geospatial databases, which can be applied to many terrain-related studies such as facility siting, hydrological analysis, and urban design.
Yifan Zhang, Wenhao Yu
doaj   +1 more source

Classifying Slope Unit by Combining Terrain Feature Lines Based on Digital Elevation Models

Land, 2023
In recent years, applications and analyses based on slope units have become increasingly widespread. Compared with grid units, slope units can better represent terrain features and boundaries and allow a more complete view of the morphology of the Earth ...
Hao Wang, Guanghui Hu, Junfei Ma, Hong Wei, Sijin Li, Guoan Tang, Liyang Xiong   +6 more
doaj   +1 more source

Feature-based volumetric terrain generation [PDF]

Proceedings of the 21st ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games, 2017
Two-dimensional heightfields are the most common data structure used for storing and rendering of terrain in offline rendering and especially real-time computer graphics. By its very nature, a heightfield cannot store terrain structures with multiple vertical layers such as overhanging cliffs, caves, or arches.
Michael Becher, Michael Krone, Guido Reina, Thomas Ertl   +3 more
openaire   +1 more source

Terrain Amplification with Implicit 3D Features [PDF]

ACM Transactions on Graphics, 2019
While three-dimensional landforms, such as arches and overhangs, occupy a relatively small proportion of most computer-generated landscapes, they are distinctive and dramatic and have an outsize visual impact. Unfortunately, the dominant heightfield representation of terrain precludes such features, and existing in-memory volumetric structures are too ...
Paris, Axel, Galin, Eric, Peytavie, Adrien, Guérin, Eric, Gain, James   +4 more
openaire   +2 more sources

An Enhanced Residual Feature Fusion Network Integrated with a Terrain Weight Module for Digital Elevation Model Super-Resolution

Remote Sensing, 2023
The scale of digital elevation models (DEMs) is vital for terrain analysis, surface simulation, and other geographic applications. Compared to traditional super-resolution (SR) methods, deep convolutional neural networks (CNNs) have shown great success ...
Guodong Chen, Yumin Chen, John P. Wilson, Annan Zhou, Yuejun Chen, Heng Su   +5 more
doaj   +1 more source

Terrain Modelling from Feature Primitives [PDF]

Computer Graphics Forum, 2015
AbstractWe introduce a compact hierarchical procedural model that combines feature‐based primitives to describe complex terrains with varying level of detail. Our model is inspired by skeletal implicit surfaces and defines the terrain elevation function by using a construction tree.
Génevaux, Jean-David, Galin, Eric, Peytavie, Adrien, Guérin, Eric, Briquet, Cyril, Grosbellet, François, Benes, Bedrich   +6 more
openaire   +3 more sources

Impact of Local Terrain Features on Urban Airflow [PDF]

Boundary-Layer Meteorology, 2023
AbstractPast work has shown that coupling can exist between atmospheric air flows at street scale (O(0.1 km)) and city scale (O(10 km)). It is generally impractical at present to develop high-fidelity urban simulations capable of capturing such effects.
Coburn, Matthew, Vanderwel, Christina, Herring, Steven, Xie, Zheng-Tong   +3 more
openaire   +2 more sources

Vibration-Based Recognition of Wheel–Terrain Interaction for Terramechanics Model Selection and Terrain Parameter Identification for Lugged-Wheel Planetary Rovers

Sensors, 2023
Identifying terrain parameters is important for high-fidelity simulation and high-performance control of planetary rovers. The wheel–terrain interaction classes (WTICs) are usually different for rovers traversing various types of terrain.
Fengtian Lv, Nan Li, Haibo Gao, Liang Ding, Zongquan Deng, Haitao Yu, Zhen Liu   +6 more
doaj   +1 more source