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(Article of periodic en Anglais - 1999)

Document title

Comparison of slope estimates from low resolution DEMs : scaling issues and a fractal method for their solution

Authors(s) and Affiliation(s)

ZHANG X. ; DRAKE N.A. ; WAINWRIGHT J. ; MULLIGAN M. ;

Abstract

Five different algorithms for calculating slope from digital elevation models (DEMs) have been compared from regional to global scales. The most significant outcome is that slope varies inversely with the DEM grid size. Thus, slopes estimated from coarse resolution data can be considered to produce significant underestimates of the true slope. A fractal theory is adapted to solve this problem. The variation of fractal parameters is discussed at various scales, and a model is developed to estimate the high resolution slope based on the coarse resolution DEM by using fractal parameters

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 1999, vol. 24, no9 [pp. 763-779]

Bibliographic references : 37 ref.

Collation : Illustration ;

Language

Anglais

Localisation

Bureau de recherches géologiques et minières - Orléans

INIST-CNRS, Cote INIST : 17355

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 1999.
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