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ACM SIGSPATIAL International Workshop on Advances in Geographic Information Systems, 2017
In principle, a digital elevation model (DEM) describes elevations of various points in a given area in digital format. In this chapter, only raster GIS based DEMs are discussed. Data for generating a DEM can be acquired from different sources such as: ground surveys, digitization of topographic contour maps, conventional aerial photographic ...
R. Gupta
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In principle, a digital elevation model (DEM) describes elevations of various points in a given area in digital format. In this chapter, only raster GIS based DEMs are discussed. Data for generating a DEM can be acquired from different sources such as: ground surveys, digitization of topographic contour maps, conventional aerial photographic ...
R. Gupta
semanticscholar +4 more sources
A digital elevation model based method for a rapid estimation of flood inundation depth
Journal of Flood Risk Management, 2019In recent years, the acquisition of data from multiple sources, together with improvements in computational capabilities, has allowed to improve our understanding on natural hazard through new approaches based on machine learning and Big Data analytics ...
S. Manfreda, C. Samela
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The Establishment of the Digital Elevation Model
Applied Mechanics and Materials, 2013Contour line map and digital terrain model are widely used in practical work. With the rapid development of computer technology, computer graphics and geographic information system, they become more and more practical and their roles have become more prominent.
Chun Di Ni, Shen Kui Liu, Xiao Wei Yin
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The “M” in digital elevation models
Cartography and Geographic Information Science, 2015The “M” in digital elevation models (DEM) stands for model, which literally means “a schematic description of a system, theory, or phenomenon that accounts for its known or inferred properties and may be used for further study of its characteristics.” A DEM fulfills the requirement of “a schematic description” of terrain.
XiaoHang Liu, Hai Hu, Peng Hu
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Digital Elevation Models By Laser Scanning
The Photogrammetric Record, 1998The TopoSys laser scanner system is designed to produce digital elevation models (DEMs) at a maximum accuracy of 0.5 m in x and y and 0.1 m in z. The regular scan pattern and the measurement frequency of 80 000 measurements per second (on average 5 measurements per m2) form the basis for high quality DEMs.The mainly automated data processing makes it ...
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Reducing elevation roundoff errors in digital elevation models
Journal of Hydrology, 1995Abstract A smoothing algorithm is presented for the removal of roundoff error, inherent in almost all digital elevation data. Elevation adjustments are kept within the tolerance of roundoff error, so that the resulting terrain model is not over smoothed.
E.James Nelson, Norman L. Jones
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Terrain Synthesis from Digital Elevation Models
IEEE Transactions on Visualization and Computer Graphics, 2007In this paper, we present an example-based system for terrain synthesis. In our approach, patches from a sample terrain (represented by a height field) are used to generate a new terrain. The synthesis is guided by a user-sketched feature map that specifies where terrain features occur in the resulting synthetic terrain.
Howard, Zhou +3 more
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The digital generalization principle of digital elevation model
SPIE Proceedings, 2009This paper briefly is based on the discussion of three fundamental characteristics of the ground (elevation accuracy, validity of elevation order, and the preservation of elevation features) and the concept of the model, then analyses major theoretical and practical shortcomings of the DEM generated in the mechanical model in depth, finally we proposes
Hai Hu, Jun Gao, Peng Hu
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Terrain feature-aware deep learning network for digital elevation model superresolution
Isprs Journal of Photogrammetry and Remote Sensing, 2022Yifan Zhang, Wenhao Yu, Di Zhu
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Challenge of aster digital elevation model
2010 IEEE International Geoscience and Remote Sensing Symposium, 2010Accuracy of digital elevation model (DEM) obtained by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) that has along-track stereovision is investigated. The pointing offset and stability of the radiometer is one cause of the geometric deviation of the ASTER DEM attached with orthorectified image. The correction methodology to
Akira Iwasaki +5 more
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