Download elevation data

The download_gmted() function accesses and downloads Global Multi-resolution Terrain Elevation Data (GMTED2010) from U.S. Geological Survey.

Usage

download_gmted(
  statistic = c("Breakline Emphasis", "Systematic Subsample", "Median Statistic",
    "Minimum Statistic", "Mean Statistic", "Maximum Statistic",
    "Standard Deviation Statistic"),
  resolution = c("7.5 arc-seconds", "15 arc-seconds", "30 arc-seconds"),
  directory_to_save = NULL,
  acknowledgement = FALSE,
  download = TRUE,
  remove_command = FALSE,
  unzip = TRUE,
  remove_zip = FALSE,
  show_progress = TRUE,
  hash = FALSE,
  max_tries = 20,
  rate_limit = 2
)

Arguments

statistic

character(1). Available statistics.

resolution

character(1). Available resolutions.

directory_to_save

character(1). Directory to save data.

acknowledgement

logical(1). Must be TRUE to proceed.

download

logical(1). DEPRECATED. Downloads happen automatically.

remove_command

logical(1). Deprecated, ignored.

unzip

logical(1). Unzip zip files (default TRUE).

remove_zip

logical(1). Remove zip files after unzipping (default FALSE).

show_progress

logical(1). Show download progress (default TRUE)

hash

logical(1). Return hash of downloaded files (default FALSE)

max_tries

integer(1). Maximum retry attempts (default 20)

rate_limit

numeric(1). Minimum seconds between requests (default 2)

Value

invisible list with download results; or hash character if hash=TRUE

Note

GMTED data does not require authentication.

References

Danielson JJ, Gesch DB (2011). “Global multi-resolution terrain elevation data 2010 (GMTED2010).” Open-File Report 2011-1073, U.S. Geological Survey. Series: Open-File Report, https://doi.org/10.3133/ofr20111073.

Author

Mitchell Manware, Insang Song

Examples

if (FALSE) { # \dontrun{
download_gmted(
  statistic = "Breakline Emphasis",
  resolution = "7.5 arc-seconds",
  directory_to_save = tempdir(),
  acknowledgement = TRUE
)
} # }