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规则格网DEM坡度坡向算法的比较分析 被引量:38

Study on the Accuracy and Algorithms for Calculating Slopes and Aspects Based on the Digital Elevation Model
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摘要 DEM的主要用途之一就是提取坡度和坡向。目前基于格网DEM的坡度坡向算法比较多 ,正确分析和评价现有算法是当前较为关心的问题。通过对格网DEM的算法进行了简要的归纳 ,然后对坡度坡向算法进行了理论分析 ,并通过实验对相关的结论进行了验证。本研究澄清了目前有关DEM坡度坡向算法中存在的一些问题 ,对实际应用有一定的指导意义。 Slope and aspect are the most frequently used terrain parameters in geoscience models, they can not only indirectly describe the shape and structure of a terrain, but also are the basic parameters in the hydrological models, monitoring and analysis of landslides, surface material movement, soil erosion models, land use planning, etc. However, there are some different viewpoints and even contradictions in the accuracy and algorithms of slope and aspect due to the differences in the sources of errors, analysis and evaluation methods. In this paper, the errors in calculating slopes and aspects with digital elevation model (DEM) are theoretically analyzed, and the conclusions concerned are verified with the experimental data so as to clarify the contradictions in calculating slopes and aspects. It is considered that the sources and characters of the errors in calculating slopes and aspects with DEM should be differentiated, and the evaluation of the algorithms should be carried out in the objective and quantitative environment with the comparable objects.
出处 《干旱区地理》 CSCD 北大核心 2004年第3期398-404,共7页 Arid Land Geography
基金 国家自然科学基金 ( 4 0 2 710 89)
关键词 数字地面模型 坡度 坡向 算法 精度 DEM digital elevation model slope aspect algorithm accuracy.
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  • 1[1]Band L E. Topographic partition of watershed with digital elevation models[J].Water Resources Research,1986,22(1):15~24.
  • 2[2]Jenson S K. Application of hydrologic information automatically extracted from digital elevation models[A]. In Beven K J, Moore I D. eds, Terrain analysis and Distributed Modelling in Hydeology[C]. John Willy & Sons, Chichester, UK, 1994, 35~48.
  • 3[3]Quinn P F, Beven K J, Lamb R. The ln(a/tanβ) index: how to calculate it and how to use it within the TOPMODEL framwork[J]. Hydrological Processes, 1995, 9: 161~182.
  • 4[4]Quinn P F, Beven K, Chevallier P, Planchon O. The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models[A]. In Beven K J, Moore I D. eds, Terrain analysis and Distributed Modelling in Hydeology[C]. John Willy & Sons, Chichester, UK, 1991, 63~83.
  • 5[5]Moore I D, O'loughlin E M, Burch G J. A contour-based topographic model for hydrological and ecological applications[J]. Earth Surface Processes and Landforms, 1988, 13: 305~320.
  • 6[6]Duan J, Grant G E. Shallow landslide delineation for steep forest watersheds based on topographic attributes and probability analysis[A]. In Wilson J P, Gallant J C. eds: Terrain analysis: Principles and Application[C]. John Wiley & Sons Press, 2000. 311~330.
  • 7[7]Desmet P J J, Govers G. Comparison of routing algorithms for digital elevation models and their implication for predicting ephemeral gullies[J]. International Journal of Geographical Information science, 1996a, 10(10): 311~331.
  • 8[8]Biesemans J, Meirvenne M V, Gabriels D. Extending the RUSLE with the Monte Carlo error progagation technique to predict long-term average off-site sediment accumulation[J]. Journal of Soil and Water Conservation, 2000, (1): 35~42.
  • 9[9]Dietrich W E, Wilson C J, Montgomery D R., McKean J. Analysis of erosion thresholds, channel networks, and landscape morphology using a digital terrain model[J]. The Journal of Geology, 1993, 10: 259~278.
  • 10[10]Mitasova H, Hofierka J, Zlocha M, Iverson L R. Modelling topographic potential for ersion deosition using GIS[J]. INT. J. Geographical Information Systems, 1996, 10(5) : 629~641.

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