Results 191 to 200 of about 1,085,325 (248)
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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 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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3D Digital Elevation Model Generation
2012This chapter presents techniques used for the generation of 3D digital elevation models (DEMs) from remotely sensed data. Three methods are explored and discussed—optical stereoscopic imagery, Interferometric Synthetic Aperture Radar (InSAR), and LIght Detection and Ranging (LIDAR). For each approach, the state-of-the-art presented in the literature is
Hong Wei, Marc Bartels
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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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Digital elevation models and TIN algorithms
1997This survey has explained a number of concepts on terrains, and some algorithms for various computations. The emphasis has been on TIN algorithms, because the TIN model for terrains is more elegant than the grid and contour line models. A common argument to use grids is the simplicity of the algorithms.
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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 model and terrain mapping using LiDAR
, 2021G. Saritha +3 more
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