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Accueil du site → Doctorat → Pays-Bas → < 2000 → A geo-information theoretical approach to inductive erosion modelling based on terrain mapping units

Wageningen Universiteit (1997)

A geo-information theoretical approach to inductive erosion modelling based on terrain mapping units

Suryana, N.

Titre : A geo-information theoretical approach to inductive erosion modelling based on terrain mapping units

Auteur : Suryana, N.

Université de soutenance : Wageningen Universiteit

Grade : PhD thesis 1997

Résumé partiel
Three main aspects of the research, namely the concept of object orientation, the development of an Inductive Erosion Model (IEM) and the development of a framework for handling uncertainty in the data or information resulting from a GIS are interwoven in this thesis. The first and the second aspect of the thesis discuss simultaneously the application of a terrain mapping unit (TA" in hierarhical observational procedures and an IEM in a GIS environment. These aspects were aimed at providing an alternative solution to the traditional approach to data acquisition, data capture and producing aggregated information for a GIS. The third aspect discusses the application of standard deviation, probability of misclassification, membership degree and plausibility reasoning for handling error and uncertainty associated with data inputs and information outputs handled by a GIS in general and into and from the Indonesian Field Engineering Design Plan (FEDP) in particular. It is aimed mainly at establishing a framework for representing uncertainty in geographical data manipulation. GIS logical models, the characteristics of logical GIS models, types of uncertainty including error due to variability, imprecision, ambiguity and a proposed conceptual framework based on the concept of certainty factors are discussed.

The research involved the establishment of stable basic mapping units that allow the definition of repeatable and hierarchical observational procedures. This solution was addressed especially to the situation when sophisticated software and good quality data are not available. In this research, TMUs are defined as areas with a particular combination of geology, geomorphology, morphometry and soil characteristics, usually obtained by interpretation of aerial photo or SPOT images. Terrain areas having similar relief characteristics are identified, delineated and verified in the field. The delineated TMUs represent natural divisions of the terrain often with distinct boundaries.

Mots clés : soil / erosion / geographical information systems / mapping / theory / remote sensing / photointerpretation / imagery / models / research

Présentation

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