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arXiv · 2105.01460

Aggregated Gaussian Processes with Multiresolution Earth Observation Covariates

Harrison Zhu·Adam Howes·Owen van Eer·Maxime Rischard·Yingzhen Li·Dino Sejdinovic·Seth Flaxman
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Abstract

For many survey-based spatial modelling problems, responses are observed as spatially aggregated over survey regions due to limited resources. Covariates, from weather models and satellite imageries, can be observed at many different spatial resolutions, making the pre-processing of covariates a key challenge for any spatial modelling task. We propose a Gaussian process regression model to flexibly handle multiresolution covariates by employing an additive kernel that can efficiently aggregate features across resolutions. Compared to existing approaches that rely on resolution matching, our approach better maintains distributional information across resolutions, leading to better performance and interpretability. Our model yields stronger predictive performance and interpretability on both simulated and crop yield datasets.

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Harrison Zhu, Adam Howes, Owen van Eer, Maxime Rischard, Yingzhen Li, Dino Sejdinovic, Seth Flaxman. 2021-05-04. Aggregated Gaussian Processes with Multiresolution Earth Observation Covariates. https://arxiv.org/abs/2105.01460

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