cms_native_proxy: Get a proxy stars object from a native service

In CopernicusMarine: Search Download and Handle Data from Copernicus Marine Service Information

Get a proxy stars object from a native service

Description

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.

Details

For more details see vignette("proxy").

Value

A stars_proxy object

Author(s)

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)
}

CopernicusMarine documentation built on Feb. 26, 2026, 9:07 a.m.