read_fude() reads Fude Polygon data as a list. The data can be downloaded
from the MAFF website as a ZIP file, which contains one or more spatial data
files, such as GeoJSON files (.json or .geojson) and FlatGeobuf
files (.fgb). The function also works with ZIP files you created, as long
as you do not change the filenames of the original files.
Usage
read_fude(
path = NULL,
pref = NULL,
year = 2024,
census_year = 2020,
stringsAsFactors = TRUE,
to_wgs84 = TRUE,
quiet = FALSE,
supplementary = FALSE
)Arguments
- path
Path to the ZIP file containing one or more supported spatial data files. Supported formats include
.geojson,.json, and.fgb.- pref
The year when the Fude Polygon data was created.
- year
The year when the Fude Polygon data was created.
- census_year
The year of the Agricultural and Forestry Census.
- stringsAsFactors
logical. Should character vectors be converted to factors?
- to_wgs84
logical. Convert JGD2000 to WGS 84.
- quiet
logical. Suppress information about the data to be read.
- supplementary
logical. If TRUE, add supplementary information for each polygon.
Value
A list of sf::sf() objects.
Examples
path <- system.file("extdata", "castle.zip", package = "fude")
d <- read_fude(path, stringsAsFactors = FALSE)
#> Reading layer `2021_382019' from data source
#> `/private/var/folders/33/1nmp7drn6c56394qxrzb2cth0000gn/T/RtmpH8URR5/filead7a72d35262/castle/2021_382019.json'
#> using driver `GeoJSON'
#> Simple feature collection with 1 feature and 6 fields
#> Geometry type: POLYGON
#> Dimension: XY
#> Bounding box: xmin: 132.7653 ymin: 33.84506 xmax: 132.7662 ymax: 33.84575
#> Geodetic CRS: WGS 84
#> Reading layer `2022_382019' from data source
#> `/private/var/folders/33/1nmp7drn6c56394qxrzb2cth0000gn/T/RtmpH8URR5/filead7a72d35262/castle/2022_382019.json'
#> using driver `GeoJSON'
#> Simple feature collection with 1 feature and 6 fields
#> Geometry type: POLYGON
#> Dimension: XY
#> Bounding box: xmin: 132.7653 ymin: 33.84506 xmax: 132.7662 ymax: 33.84575
#> Geodetic CRS: WGS 84
#> Reading layer `2022_382078' from data source
#> `/private/var/folders/33/1nmp7drn6c56394qxrzb2cth0000gn/T/RtmpH8URR5/filead7a72d35262/castle/2022_382078.json'
#> using driver `GeoJSON'
#> Simple feature collection with 1 feature and 6 fields
#> Geometry type: POLYGON
#> Dimension: XY
#> Bounding box: xmin: 132.541 ymin: 33.50931 xmax: 132.5415 ymax: 33.50966
#> Geodetic CRS: WGS 84