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Download CropScape data

Source: R/download.R
download_cropscape.Rd

Accesses and downloads United States Department of Agriculture CropScape Cropland Data Layer data from the USDA National Agricultural Statistics Service or the George Mason University website.

Usage

download_cropscape(
  year = seq(1997, 2023),
  source = c("USDA", "GMU"),
  directory_to_save = NULL,
  acknowledgement = FALSE,
  download = FALSE,
  remove_command = FALSE,
  unzip = TRUE,
  hash = FALSE
)

Arguments

year

integer(1). Year of the data to download.

source

character(1). Data source, one of c("USDA", "GMU").

  • "USDA" will download the national data from the USDA website (available in 2008-last year).

  • "GMU" will download the data from the George Mason University website (available in 1997-last year).

directory_to_save

character(1). Directory to download files.

acknowledgement

logical(1). By setting TRUE the user acknowledges that the data downloaded using this function may be very large and use lots of machine storage and memory.

download

logical(1). FALSE will generate a *.txt file containing all download commands. By setting TRUE the function will download all of the requested data files.

remove_command

logical(1). Remove (TRUE) or keep (FALSE) the text file containing download commands.

unzip

logical(1). Unzip the downloaded compressed files. Default is FALSE.

hash

logical(1). By setting TRUE the function will return an rlang::hash_file() hash character corresponding to the downloaded files. Default is FALSE.

Value

  • For hash = FALSE, NULL

  • For hash = TRUE, an rlang::hash_file character.

  • Yearly comma-separated value (CSV) files will be stored in directory_to_save.

Note

JSON files should be found at STAC catalog of OpenLandMap

Author

Insang Song

Examples

if (FALSE) { # \dontrun{
download_cropscape(
  year = 2020,
  source = "USDA",
  directory_to_save = tempdir(),
  acknowledgement = TRUE,
  download = FALSE, # NOTE: download skipped for examples,
  remove_command = TRUE,
  unzip = FALSE
)
} # }