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Effect of spatial data resolution on uncertainty

Pogson, MA and Smith, P (2015) Effect of spatial data resolution on uncertainty. ENVIRONMENTAL MODELLING & SOFTWARE, 63. pp. 87-96. ISSN 1364-8152

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Abstract

The effect that the resolution of spatial data has on uncertainty is important to many areas of research. In order to understand this better, the effect of changing resolution is considered for a range of data. An estimate is presented for how the average uncertainty of each grid value varies with grid size, which is shown to be in good agreement with observed uncertainties. The effect of bilinear interpolation is also investigated and is observed to provide no reduction in uncertainty relative to uninterpolated data. Finally, the effects of combining aggregated spatial data are found to obey standard properties of error propagation, which means that the presented estimate of uncertainty can be used to estimate resolution-related uncertainty in spatial model results, relative to the input data. The study quantitatively demonstrates the important role of the spatial autocorrelation of data in uncertainties associated with the resolution of spatial data.

Item Type: Article
Uncontrolled Keywords: MD Multidisciplinary
Subjects: H Social Sciences > HA Statistics
Q Science > QA Mathematics
Divisions: Applied Mathematics
Publisher: Elsevier
Date Deposited: 19 Oct 2016 10:34
Last Modified: 07 Sep 2017 13:05
DOI or Identification number: 10.1016/j.envsoft.2014.09.021
URI: http://researchonline.ljmu.ac.uk/id/eprint/4645

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