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SCIENTIA GEOGRAPHICA SINICA >

2010 , Vol. 30 >Issue 3: 398 - 402

DOI: https://doi.org/10.13249/j.cnki.sgs.2010.03.398

Uncertainty of Terrain Information Content Based on Grid DEM

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  • 1. Key Laboratory of Virtual Geographic Environment of Ministry of Education, Nanjing Normal University, Nanjing, Jiangsu 210046;
    2. Land Information Engineering Department, Chuzhou University, Chuzhou, Anhui 239000

Received date: 2009-08-06

  Revised date: 2009-11-09

  Online published: 2010-05-20

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Abstract

Precision of DEM terrain information content is a key factor to judge the applicability and limit of DEM data. An experiment is designed to find out the effect of DEM subset partition strategy and number of subsets to the estimate precision of DEM terrain information content based on DEM, slope and aspect data of hilly and gully test areas on the Loess Plateau. The result shows that DEM terrain information content is affected by both terrain information and subset partition strategy. To weaken the uncertainty of DEM terrain information content calculated by traditional algorithms, this paper presents a DEM subset partition model based on the maximum entropy theorem. It provides an objective theoretical basis for DEM information content calculation and has been proved efficient to avoid the subjectivity and arbitrariness in DEM artificial classification.

Cite this article

TAO Yang, TANG Guo-an, WANG Chun, ZHU Shi-jie, YANG Xin . Uncertainty of Terrain Information Content Based on Grid DEM[J]. SCIENTIA GEOGRAPHICA SINICA, 2010 , 30(3) : 398 -402 . DOI: 10.13249/j.cnki.sgs.2010.03.398

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