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[1]SHI Ming-chang,SHEN Jing-yu.Studies on the Relations Between the Grids Size of Various Undulate Landforms and the Accuracy of DEM[J].Research of Soil and Water Conservation,2006,13(03):35-38.

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Studies on the Relations Between the Grids Size of Various Undulate Landforms and the Accuracy of DEM

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 13 Number of periods: 2006年03期 Page number: 35-38 Column: Public date: 1900-01-01

Title:: Studies on the Relations Between the Grids Size of Various Undulate Landforms and the Accuracy of DEM

Author(s):: SHI Ming-chang, SHEN Jing-yu; The College of Resource and Environment, Beijing Forestry University, Beijing 100083, China

Keywords:: DEM; grid size; accuracy

CLC:: TP79

DOI:: -

Abstract:: Taken different landforms as experimental area, statistical analytical methods and random samples were applied into this experiment.While comparing the variety of the grids’ size in DEM (Digital Elevation Model), the authors calculated the errors of altitudes and the cross section curvatures, analyzed the qualitative relation between the size of DEM grids and the accuracy DEM through different undulate landforms, which drawn the conclusion that there are two important factors which could influence DEM precision.They are the size of grids and the average cross section curvature which shows the topographical complexity.Through a series expression formulae, the quantitative relation between the size of grids and the DEM accuracy was got.According to this model, users may choose the suitable size of DEM in accord with different landforms and accurate demands, thus offers the theoretical foundation for further use in practices.

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Last Update: 1900-01-01