Subset and download a specific marine product from Copernicus — cms_download

Subset and download a specific marine product from Copernicus.

Usage

cms_download_subset(
  username = cms_get_username(),
  password = cms_get_password(),
  destination,
  product,
  layer,
  variable,
  region,
  timerange,
  verticalrange,
  overwrite = FALSE,
  progress = TRUE,
  crop = TRUE,
  asset,
  ...
)

Arguments

username: Your Copernicus marine user name. Can be provided with cms_get_username() (default), or as argument here.
password: Your Copernicus marine password. Can be provided as cms_get_password() (default), or as argument here.
destination: This argument is deprecated. Data is no longer written to a file but loaded as a stars::st_as_stars() object into memory.
product: An identifier (type character) of the desired Copernicus marine product. Can be obtained with cms_products_list.
layer: The name of a desired layer within a product (type character). Can be obtained with cms_product_details.
variable: The name of a desired variable in a specific layer of a product (type character). Can be obtained with cms_product_details.
region: Specification of the bounding box as a vector of numerics WGS84 lat and lon coordinates. Should be in the order of: xmin, ymin, xmax, ymax.
timerange: A vector with two elements (lower and upper value) for a requested time range. The vector should be coercible to POSIXct.
verticalrange: A vector with two elements (minimum and maximum) numerical values for the depth of the vertical layers (if any). Note that values below the sea surface needs to be specified as negative values.
overwrite: This argument is deprecated. Data is no longer written to a file but loaded as a stars::st_as_stars() object into memory.
progress: A logical value. When TRUE (default) progress is reported to the console. Otherwise, this function will silently proceed.
crop: On the server, the data is organised in chunks. The subset will download chunks that overlap with the specified ranges, but often covers a larger area. When crop = TRUE (default), the data will be cropped to the specified region. If set to FALSE all downloaded data will be returned.
asset: Type of asset to be used when subsetting data. Should be one of "default", "ARCO", "static", "omi", or "downsampled4". When missing, set to NULL or set to "default", it will use the first asset available for the requested product and layer, in the order as listed before.
...: Ignored (reserved for future features).

Value

Returns a stars::st_as_stars() object.

Author

Pepijn de Vries

Examples

if (interactive() && requireNamespace("blosc")) {

  mydata <- cms_download_subset(
    product       = "GLOBAL_ANALYSISFORECAST_PHY_001_024",
    layer         = "cmems_mod_glo_phy-cur_anfc_0.083deg_P1D-m",
    variable      = c("uo", "vo"),
    region        = c(-1, 50, 10, 55),
    timerange     = c("2025-01-01 UTC", "2025-01-02 UTC"),
    verticalrange = c(0, -2)
  )

  plot(mydata["vo"])
} else {
  message("Make sure to run this in an interactive environment")
  message("and that the package 'blosc' is installed")
}
#> Make sure to run this in an interactive environment
#> and that the package 'blosc' is installed