Disaggregation of polygons of surficial geology and soil maps using spatial modelling and legacy data

Bui, E. N. and Moran, C. J. (2001) Disaggregation of polygons of surficial geology and soil maps using spatial modelling and legacy data. Geoderma, 103 1-2: 79-94. doi:10.1016/S0016-7061(01)00070-2


Author Bui, E. N.
Moran, C. J.
Title Disaggregation of polygons of surficial geology and soil maps using spatial modelling and legacy data
Journal name Geoderma   Check publisher's open access policy
ISSN 0016-7061
Publication date 2001-01-01
Sub-type Article (original research)
DOI 10.1016/S0016-7061(01)00070-2
Volume 103
Issue 1-2
Start page 79
End page 94
Total pages 16
Place of publication Amsterdam
Publisher Elsevier Science Bv
Language eng
Abstract Examples from the Murray-Darling basin in Australia are used to illustrate different methods of disaggregation of reconnaissance-scale maps. One approach for disaggregation revolves around the de-convolution of the soil-landscape paradigm elaborated during a soil survey. The descriptions of soil ma units and block diagrams in a soil survey report detail soil-landscape relationships or soil toposequences that can be used to disaggregate map units into component landscape elements. Toposequences can be visualised on a computer by combining soil maps with digital elevation data. Expert knowledge or statistics can be used to implement the disaggregation. Use of a restructuring element and k-means clustering are illustrated. Another approach to disaggregation uses training areas to develop rules to extrapolate detailed mapping into other, larger areas where detailed mapping is unavailable. A two-level decision tree example is presented. At one level, the decision tree method is used to capture mapping rules from the training area; at another level, it is used to define the domain over which those rules can be extrapolated. (C) 2001 Elsevier Science B.V. All rights reserved.
Keyword Agriculture, Soil Science
Polygon Disaggregation
Spatial Disaggregation
Soil-landscape Models
Barwon River
Fluvial Facies
Rule Induction
Decision Trees
Hierarchical Spatial Classification
Uncertainty
Soil Science
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Sustainable Minerals Institute Publications
 
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Created: Mon, 13 Aug 2007, 22:29:31 EST