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Spatial Data Analysis with Terra

Objective

Experimentation of spatial data analysis with terra in R.

Initially I used library(raster) but could not get data out via getData("GADM", ...). The US Davies server that hosts the RDS file is well known to be flakey (documented here and here).

Installation

> sessionInfo()
R version 4.4.1 (2024-06-14 ucrt)
Platform: x86_64-w64-mingw32/x64
Running under: Windows 10 x64 (build 19045)

Matrix products: default


locale:
[1] LC_COLLATE=English_Canada.utf8  LC_CTYPE=English_Canada.utf8    LC_MONETARY=English_Canada.utf8 LC_NUMERIC=C                   
[5] LC_TIME=English_Canada.utf8    

time zone: America/Vancouver
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] lubridate_1.9.3 forcats_1.0.0   stringr_1.5.1   dplyr_1.1.4     purrr_1.0.2     tidyr_1.3.1     tibble_3.2.1    ggplot2_3.5.1  
 [9] tidyverse_2.0.0 terra_1.7-78    readr_2.1.5    

loaded via a namespace (and not attached):
 [1] gtable_0.3.5      jsonlite_1.8.8    compiler_4.4.1    highr_0.11        tidyselect_1.2.1  Rcpp_1.0.13       jquerylib_0.1.4  
 [8] scales_1.3.0      yaml_2.3.10       fastmap_1.2.0     R6_2.5.1          generics_0.1.3    knitr_1.48        munsell_0.5.1    
[15] bslib_0.8.0       pillar_1.9.0      tzdb_0.4.0        rlang_1.1.4       utf8_1.2.4        stringi_1.8.4     cachem_1.1.0     
[22] xfun_0.46         sass_0.4.9        timechange_0.3.0  cli_3.6.3         withr_3.0.1       magrittr_2.0.3    digest_0.6.36    
[29] grid_4.4.1        rstudioapi_0.16.0 hms_1.1.3         lifecycle_1.0.4   vctrs_0.6.5       evaluate_0.24.0   glue_1.7.0       
[36] codetools_0.2-20  fansi_1.0.6       colorspace_2.1-1  rmarkdown_2.28    tools_4.4.1       pkgconfig_2.0.3   htmltools_0.5.8.1
> getRversion()
[1] ‘4.4.1’

Dataset

2011 Census - Boundary files by Statistics Canada
BC Gazetteer by BC Data Catalogue

Reference

Spatial Data Science
Terra: Special Data Science