Provides boundary 'GeoPackage' files used by the 'jpmap' package, including Japan prefecture example boundaries and official MLIT N03 administrative area data converted for 'jpmap'. Keeping these data in a separate package lets 'jpmap' update its functionality without repeatedly redistributing large boundary files on CRAN mirrors.
jpmapdata contains boundary GeoPackage files used by
jpmap.
The package is intentionally separate from jpmap so updates to map-drawing
functionality do not require CRAN mirrors to store the same boundary data again.
install.packages("jpmapdata")
install.packages("jpmap")
library(jpmap)
plot_jpmap("prefecture")
plot_jpmap("municipality", include = "Okinawa")
The package currently includes:
jpmap_boundaries_2021.gpkg: Japan prefecture example boundaries.jpmap_boundaries_2024_47.gpkg: official MLIT N03 2024 municipal boundaries
for Okinawa Prefecture.For all-prefecture municipal boundaries, use jpmap::jpmap_build_data() to
build the national MLIT N03 file locally:
jpmap_build_data(year = 2024)
The national 2024 GeoPackage is very large, so it is not bundled in the first
CRAN-facing jpmapdata package.