Aplicación del método de simulación secuencial directa para la evaluación de la incertidumbre a nivel local en modelos digitales de elevaciones

  1. Delgado García, J. 1
  2. Soares, A. 2
  3. Pérez García, J. L. 1
  4. Carvalho, J. 2
  1. 1 Universidad de Jaén
    info

    Universidad de Jaén

    Jaén, España

    ROR https://ror.org/0122p5f64

  2. 2 Universidade de Lisboa
    info

    Universidade de Lisboa

    Lisboa, Portugal

    ROR https://ror.org/01c27hj86

Book:
El acceso a la información espacial y las nuevas tecnologías geográficas
  1. M.T. Camacho Olmedo (ed. lit.)
  2. J.A. Cañete Pérez (ed. lit.)
  3. J.J. Lara Valle (ed. lit.)

Publisher: Universidad de Granada

ISBN: 84-338-3944-6

Year of publication: 2006

Pages: 119-132

Congress: Congreso Nacional de Tecnologías de la Información Geográfica (12. 2006. Granada)

Type: Conference paper

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Abstract

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…).

Data source: Dialnet