Get a proxy stars object from a native service — cms_native

The advantage of stars_proxy objects, is that they do not contain any data. They are therefore fast to handle and consume only limited memory. You can still manipulate the object lazily (like selecting slices). These operation are only executed when calling stars::st_as_stars() or plot() on the object.

Usage

cms_native_proxy(
  product,
  layer,
  pattern,
  prefix,
  variable,
  ...,
  username = cms_get_username(),
  password = cms_get_password()
)

Arguments

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_services (listed as id column).
pattern: A regular expression (regex) pattern. Only paths that match the pattern will be returned. It can be used to select specific files. For instance if pattern = "2022/06/", only files for the year 2022 and the month June will be listed (assuming that the file path is structured as such, see examples)
prefix: A character string. A prefix to be added to the search path of the files. Only the matching file (info) is downloaded (generally faster then using pattern)
variable: The variable name for which to create the stars_proxy. If omitted it will include all variables in the layer.
...: Ignored
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.

Value

A stars_proxy object

Details

For more details see vignette("proxy").

Author

Pepijn de Vries

Examples

if (interactive()) {
  native_proxy <-
    cms_native_proxy(
      product       = "GLOBAL_ANALYSISFORECAST_PHY_001_024",
      layer         = "cmems_mod_glo_phy_anfc_0.083deg_PT1H-m",
      prefix        = "2022/06/",
      pattern       = "20220621"
    )
  plot(native_proxy["zos", 1:1000, 1:500, 1, 1], axes = TRUE)
}