Aplicación del método de simulación secuencial directa para la evaluación de la incertidumbre a nivel local en modelos digitales de elevaciones
- Delgado García, J. 1
- Soares, A. 2
- Pérez García, J. L. 1
- Carvalho, J. 2
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1
Universidad de Jaén
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2
Universidade de Lisboa
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- M.T. Camacho Olmedo (ed. lit.)
- J.A. Cañete Pérez (ed. lit.)
- J.J. Lara Valle (ed. lit.)
Editorial: Universidad de Granada
ISBN: 84-338-3944-6
Año de publicación: 2006
Páginas: 119-132
Congreso: Congreso Nacional de Tecnologías de la Información Geográfica (12. 2006. Granada)
Tipo: Aportación congreso
Resumen
In this paper a methodology for local uncertainty due to the modelling process in a DEM generation is presented. Local uncertainty is a basic aspect to determine the final quality of the DEM and it is crucial in order to establish the capabilities of use of the model. The proposed methodology is based in the use of geostatistical simulation procedure that provides “possible versions” of the reality from limited terrain information (XYZ terrain points). The simulated model generated by the geostatistical simulation procedure (direct sequential simulation) allows obtaining the cdf of the elevation in each grid node. Using this cdfs it is possible to calculate the uncertainty of the DEMs (variance, interquartile range, entropy) through a simple probabilistic analysis and several realisations of DEM that preserves the statistical characteristics of the measured data (histogram, variogram…).