cms_download_subset {CopernicusMarine}

Subset and download a specific marine product from Copernicus

Description

Subset and download a specific marine product from Copernicus. You need to register an account at https://data.marine.copernicus.eu before you can use this function.

Usage

cms_download_subset(
  username = getOption("CopernicusMarine_uid", ""),
  password = getOption("CopernicusMarine_pwd", ""),
  destination,
  product,
  layer,
  variable,
  region,
  timerange,
  verticalrange,
  overwrite = FALSE
)

Arguments

username

Your Copernicus marine user name. Can be provided as options(CopernicusMarine_uid = "my_user_name"), or as argument here.

password

Your Copernicus marine password. Can be provided as options(CopernicusMarine_pwd = "my_password"), or as argument here.

destination

File or path where the requested file will be downloaded to.

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 copernicus_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

A logical value. When FALSE (default), files at the destination won't be overwritten when the exist. Instead an error will be thrown if this is the case. When set to TRUE, existing files will be overwritten.

Value

Returns a logical value invisibly indicating whether the requested file was successfully stored at the destination.

Author(s)

Pepijn de Vries

Examples

## Not run: 
destination <- tempfile("copernicus", fileext = ".nc")

## Assuming that Copernicus account details are provided as `options`
cms_download_subset(
  destination   = destination,
  product       = "GLOBAL_ANALYSISFORECAST_PHY_001_024",
  layer         = "cmems_mod_glo_phy-cur_anfc_0.083deg_P1D-m",
  variable      = "sea_water_velocity",
  region        = c(-1, 50, 10, 55),
  timerange     = c("2021-01-01 UTC", "2021-01-02 UTC"),
  verticalrange = c(0, -2)
)

mydata <- stars::read_stars(destination)

plot(mydata["vo"])

## End(Not run)