library(stars)
#> Loading required package: abind
#> Loading required package: sf
#> Linking to GEOS 3.13.0, GDAL 3.10.1, PROJ 9.5.1; sf_use_s2() is TRUE
# Download global NDVI data which average the values from 2024-05-01 to 2024-05-10
options(timeout = 1200)
tmp_nc <- tempfile(fileext = ".nc")
download.file(
url = "https://globalland.vito.be/download/netcdf/ndvi/ndvi_300m_v2_10daily/2024/20240501/c_gls_NDVI300_202405010000_GLOBE_OLCI_V2.0.1.nc",
destfile = tmp_nc,
mode = "wb",
quiet = !interactive()
)
# Read-in the data
global_NDVI <- read_stars(
.x = tmp_nc,
sub = "NDVI",
quiet = FALSE
)
#> NDVI,
# Italian bbox for subsetting
bbox_italy <- st_bbox(c(xmin = 6.6273, xmax = 18.5208, ymin = 36.619987, ymax = 47.0945), crs = "OGC:CRS84")
# Subset NDVI and
italy_NDVI <- global_NDVI[bbox_italy] |> st_as_stars()
# Plot
plot(italy_NDVI, col = \(n, alpha) terrain.colors(n, alpha, rev = TRUE))
#> downsample set to 5
Created on 2025-03-31 with reprex v2.1.1.9000
Session info
sessioninfo::session_info()
#> Warning in system2("quarto", "-V", stdout = TRUE, env = paste0("TMPDIR=", :
#> running command '"quarto"
#> TMPDIR=C:/Users/andre/AppData/Local/Temp/Rtmp6RI4NB/file60fc628f5e60 -V' had
#> status 1
#> ─ Session info ───────────────────────────────────────────────────────────────
#> setting value
#> version R version 4.4.2 (2024-10-31 ucrt)
#> os Windows 11 x64 (build 26100)
#> system x86_64, mingw32
#> ui RTerm
#> language (EN)
#> collate Italian_Italy.utf8
#> ctype Italian_Italy.utf8
#> tz Europe/Rome
#> date 2025-03-31
#> pandoc 3.2 @ C:/Program Files/RStudio/resources/app/bin/quarto/bin/tools/ (via rmarkdown)
#> quarto NA @ C:\\PROGRA~1\\RStudio\\RESOUR~1\\app\\bin\\quarto\\bin\\quarto.exe
#>
#> ─ Packages ───────────────────────────────────────────────────────────────────
#> package * version date (UTC) lib source
#> abind * 1.4-8 2024-09-12 [1] CRAN (R 4.4.2)
#> class 7.3-22 2023-05-03 [2] CRAN (R 4.4.2)
#> classInt 0.4-11 2025-01-08 [1] CRAN (R 4.4.2)
#> cli 3.6.4 2025-02-13 [1] CRAN (R 4.4.3)
#> curl 6.2.1 2025-02-19 [1] CRAN (R 4.4.2)
#> DBI 1.2.3 2024-06-02 [1] CRAN (R 4.4.2)
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#> KernSmooth 2.23-24 2024-05-17 [2] CRAN (R 4.4.2)
#> knitr 1.49 2024-11-08 [1] CRAN (R 4.4.2)
#> lifecycle 1.0.4 2023-11-07 [1] CRAN (R 4.4.2)
#> magrittr 2.0.3 2022-03-30 [1] CRAN (R 4.4.2)
#> proxy 0.4-27 2022-06-09 [1] CRAN (R 4.4.2)
#> Rcpp 1.0.14 2025-01-12 [1] CRAN (R 4.4.2)
#> reprex 2.1.1.9000 2025-02-25 [1] Github (tidyverse/reprex@07cd5d7)
#> rlang 1.1.5 2025-01-17 [1] CRAN (R 4.4.2)
#> rmarkdown 2.29 2024-11-04 [1] CRAN (R 4.4.2)
#> rstudioapi 0.17.1 2024-10-22 [1] CRAN (R 4.4.2)
#> sessioninfo 1.2.3 2025-02-05 [1] CRAN (R 4.4.2)
#> sf * 1.0-19 2024-11-05 [1] CRAN (R 4.4.2)
#> stars * 0.6-8 2025-02-01 [1] CRAN (R 4.4.2)
#> units 0.8-7 2025-03-10 [1] Github (r-quantities/units@cb8869c)
#> withr 3.0.2 2024-10-28 [1] CRAN (R 4.4.2)
#> xfun 0.51.2 2025-02-20 [1] https://yihui.r-universe.dev (R 4.4.2)
#> xml2 1.3.6 2023-12-04 [1] CRAN (R 4.4.2)
#> yaml 2.3.10 2024-07-26 [1] CRAN (R 4.4.2)
#>
#> [1] C:/Users/andre/AppData/Local/R/win-library/4.4
#> [2] C:/Program Files/R/R-4.4.2/library
#> * ── Packages attached to the search path.
#>
#> ──────────────────────────────────────────────────────────────────────────────