Spatio-Temporal Interpolation using gstat

Gräler, Benedikt; Pebesma, Edzer; Heuvelink, G.B.M.

doi:10.32614/rj-2016-014

Cited by 616 publications

(409 citation statements)

References 22 publications

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“…Statistical analyses were undertaken using the R programming language (R Core Team ): GAMMs were fitted using the “gamm4” package (Wood & Scheipl ), spatial and temporal semi‐variograms were constructed using the “gstat” package (Gräler, Pebesma, & Heuvelink, ), k ‐fold cross validation was undertaken using the “dismo” package (Hijmans, Phillips, Leathwick, & Elith, ) and linear mixed effects models were fitted using the “lme4” package (Bates et al., ).…”

Section: Methodsmentioning

confidence: 99%

Rapid shifts in distribution and high‐latitude persistence of oceanographic habitat revealed using citizen science data from a climate change hotspot

Champion

Hobday

Tracey

et al. 2018

Global Change Biology

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The environmental effects of climate change are predicted to cause distribution shifts in many marine taxa, yet data are often difficult to collect. Quantifying and monitoring species' suitable environmental habitats is a pragmatic approach for assessing changes in species distributions but is underdeveloped for quantifying climate change induced range shifts in marine systems. Specifically, habitat predictions present opportunities for quantifying spatiotemporal distribution changes while accounting for sources of natural climate variation. Here we demonstrate the utility of a marine-based habitat model parameterized using citizen science data and remotely sensed environmental covariates for quantifying shifts in oceanographic habitat suitability over 22 years for a coastal-pelagic fish species in a climate change hotspot. Our analyses account for the effects of natural intra- and interannual climate variability to reveal rapid poleward shifts in core (94.4 km/decade) and poleward edge (108.8 km/decade) oceanographic habitats. Temporal persistence of suitable oceanographic habitat at high latitudes also increased by approximately 3 months over the study period. Our approach demonstrates how marine citizen science data can be used to quantify range shifts, but necessitates shifting focus from species distributions directly, to the distribution of species' environmental habitat preferences.

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Section: Methodsmentioning

confidence: 99%

Rapid shifts in distribution and high‐latitude persistence of oceanographic habitat revealed using citizen science data from a climate change hotspot

Champion

Hobday

Tracey

et al. 2018

Global Change Biology

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“…In order to find the best exposure prediction, various semivariogram models were fitted and the model rendering the lowest root mean square error (RMSE) [30] was used for the lithium exposure assessment. The semivariogram and spatial interpolation of the lithium measurements were calculated in R Version 3.1.0 (R Foundation for Statistical Computing, Vienna, Austria) using the gstat package (Version 1.1.3 [31,32]).…”

Section: Methodsmentioning

confidence: 99%

Lithium in Drinking Water and Incidence of Suicide: A Nationwide Individual-Level Cohort Study with 22 Years of Follow-Up

Knudsen

Schullehner

Hansen

et al. 2017

IJERPH

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Suicide is a major public health concern. High-dose lithium is used to stabilize mood and prevent suicide in patients with affective disorders. Lithium occurs naturally in drinking water worldwide in much lower doses, but with large geographical variation. Several studies conducted at an aggregate level have suggested an association between lithium in drinking water and a reduced risk of suicide; however, a causal relation is uncertain. Individual-level register-based data on the entire Danish adult population (3.7 million individuals) from 1991 to 2012 were linked with a moving five-year time-weighted average (TWA) lithium exposure level from drinking water hypothesizing an inverse relationship. The mean lithium level was 11.6 μg/L ranging from 0.6 to 30.7 μg/L. The suicide rate decreased from 29.7 per 100,000 person-years at risk in 1991 to 18.4 per 100,000 person-years in 2012. We found no significant indication of an association between increasing five-year TWA lithium exposure level and decreasing suicide rate. The comprehensiveness of using individual-level data and spatial analyses with 22 years of follow-up makes a pronounced contribution to previous findings. Our findings demonstrate that there does not seem to be a protective effect of exposure to lithium on the incidence of suicide with levels below 31 μg/L in drinking water.

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“…In the First International Symposium on Spatiotemporal Computing held in July 2015 at George Mason University, one of the panelists suggested revising the First Law of Geography to include temporal proximity. However, spatiotemporal interpolation methods have been applied widely for decades (Li and Revesz ), even incorporated in popular statistical software packages such as R (Gräler, and others ). Some of these methods assume that distance in space and in time are interchangeable at some rate, and that rate can be determined by the sample data through covariance modeling (Stein ).…”

Section: Time And/or Space‐time?mentioning

confidence: 99%

Evaluating the Geographic in GIS

Guan

Wilson

Knowles

2019

Geographical Review

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Despite several decades of discussion and debate around the role of GIS in the discipline of Geography, it would be a stretch to argue that GIS has not irreversibly altered the discipline, both in the scope of research and teaching as well as in the wider imagination of a general public. However, it remains a challenge to incorporate the range of geographic knowledge, born of a diversity of modalities, into operational insights and analytical pre‐conditions in a GIS. To be certain, some irreconcilability between GIS and geographical inquiry is to be expected, epistemologically speaking. In what follows, we consider what might be meant by a shift to geographic analysis as scholars from disciplines in the humanities and social sciences turn to GIS as a method of observation, interpretation, analysis, and representation. In this context, we engage in a thought experiment and offer some commentary, fixing the notion of information system, while opening the geographic in GIS to more variable understanding. The point is to pursue greater development of GIS theory and method, encompassing, while not reducing, scientific, social scientific, and humanities research.

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Spatio-Temporal Interpolation using gstat

Cited by 616 publications

References 22 publications

Rapid shifts in distribution and high‐latitude persistence of oceanographic habitat revealed using citizen science data from a climate change hotspot

Rapid shifts in distribution and high‐latitude persistence of oceanographic habitat revealed using citizen science data from a climate change hotspot

Lithium in Drinking Water and Incidence of Suicide: A Nationwide Individual-Level Cohort Study with 22 Years of Follow-Up

Evaluating the Geographic in GIS

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