Modeling spatial dependence in high spatial resolution hyperspectral data sets |
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| Authors: | Daniel A Griffith |
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| Institution: | (1) Department of Geography, Syracuse University, Syracuse, NY 13244-1020, USA (e-mail: griffith@maxwell.syr.edu), US |
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| Abstract: | As either the spatial resolution or the spatial scale for a geographic landscape increases, both latent spatial dependence
and spatial heterogeneity also will tend to increase. In addition, the amount of georeferenced data that results becomes massively
large. These features of high spatial resolution hyperspectral data present several impediments to conducting a spatial statistical
analysis of such data. Foremost is the requirement of popular spatial autoregressive models to compute eigenvalues for a row-standardized
geographic weights matrix that depicts the geographic configuration of an image's pixels. A second drawback arises from a
need to account for increased spatial heterogeneity. And a third concern stems from the usefulness of marrying geostatistical
and spatial autoregressive models in order to employ their combined power in a spatial analysis. Research reported in this
paper addresses all three of these topics, proposing successful ways to prevent them from hindering a spatial statistical
analysis. For illustrative purposes, the proposed techniques are employed in a spatial analysis of a high spatial resolution
hyperspectral image collected during research on riparian habitats in the Yellowstone ecosystem.
Received: 25 February 2001 / Accepted: 2 August 2001 |
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| Keywords: | : Eigenvalue spatial autocorrelation spatial autoregression geostatistics spatial heterogeneity high spatial resolution hyperspectral |
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