EGU2020-1355, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-1355
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

HER: an information theoretic alternative for geostatistics

Stephanie Thiesen1, Diego Vieira2,3, Mirko Mälicke1, Florian Wellmann4, and Uwe Ehret1
Stephanie Thiesen et al.
  • 1Karlsruhe Institute of Technology, Institute of Water Resources and River Basin Management, Germany (stephanie.thiesen@kit.edu)
  • 2Department for Microsystems Engineering, University of Freiburg, Freiburg, Germany
  • 3Bernstein Center Freiburg, University of Freiburg, Freiburg, Germany
  • 4Computational Geosciences and Reservoir Engineering, RWTH Aachen University, Aachen, Germany

Interpolation of spatial data has been considered in many different forms. This study proposes a stochastic, non-parametric, geostatistical estimator that combines measures of information theory with probability aggregation method. Histogram via entropy reduction (HER) can be used to analyze the data spatial correlation and for predicting distributions at unobserved locations directly based on empirical probability. The method minimizes estimation uncertainty, relaxes normality assumptions and therefore avoids the risk of adding information not available in data (or losing available information). In particular, the applied probability aggregation method provides a proper framework for uncertainty estimation that reflects both the spatial configuration of the data as well as data values, while allowing to infer (or introduce) physical properties (continuous or discontinuous characteristics) from the field under study. Three different aggregation methods were explored in terms of uncertainty, resulting in predictions ranging from conservative to more confident ones. We investigate the performance of the framework using four synthetically generated datasets from known Gaussian processes and demonstrate the efficacy of the method in ascertaining the underlying true field with varying sample sizes. By comparing the method performance to popular benchmark models, namely nearest neighbors (NN), inverse distance weighting (IDW) and ordinary kriging (OK), we were able to obtain competitive results with respect to OK, with the advantage of presenting generalization properties. The novel method brings a new perspective of spatial and uncertainty analysis to geostatistics and statistical learning, using the lens of information theory.

How to cite: Thiesen, S., Vieira, D., Mälicke, M., Wellmann, F., and Ehret, U.: HER: an information theoretic alternative for geostatistics, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-1355, https://doi.org/10.5194/egusphere-egu2020-1355, 2019

Comments on the presentation

AC: Author Comment | CC: Community Comment | Report abuse

Presentation version 1 – uploaded on 20 Apr 2020 , no comments