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(Article of periodic en Anglais - 2010)

Document title

Comparing mapping approaches at subcatchment scale in northern Thailand with emphasis on the Maximum Likelihood approach

Authors(s) and Affiliation(s)

SCHULER U. (1) ; HERRMANN L. (2) ; INGWERSEN J. (2) ; ERBE P. (3) ; STAHR K. (2) ;
(1) Federal Inst. for Geosciences and Natural resources (BGR), B2.2 Spatial Information Soil and Water, Hannover, ALLEMAGNE
(2) Univ. of Hohenheim, Inst. of Soil Science and Land Evaluation, Stuttgart, ALLEMAGNE
(3) The Uplands Program, Fac. of Agriculture, Univ., Chiang Mai, THAILANDE

Abstract

This study compares different soil mapping approaches in three different petrographic areas in order to test their suitability for regional mapping in northern Thailand. Sampling was based on transects or grid-based randomization. Maps were created based on expert knowledge (eye fitting) or using Classification Tree (CART algorithm) or the Maximum Likelihood approach. In addition, local knowledge-based-soil maps were created. Validation was performed using soil reference maps and independent sampling points. Among the mapping approaches investigated only the Maximum Likelihood approach and the Classification Tree method are suitable for upscaling procedures. It seems to be most useful to combine the different approaches in particular with the SOTER approach (FAO, 1995)

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2010, vol. 81, no2 [pp. 137-171]

Bibliographic references : 38 ref.

Collation : 10 fig., 17 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2010.02.003

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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