Download VIIRS Black Marble annual nighttime lights — ntl_download • lightson

Downloads NASA VIIRS/Black Marble VNP46A4 annual composite rasters from NASA LAADS DAAC for a given region and year range.

Usage

ntl_download(source = "viirs", region, years, token, force = FALSE)

Arguments

source: Character. Currently only "viirs" is supported.
region: An sf object, SpatVector, or ISO 3166-1 alpha-3 country code (e.g., "IND").
years: Integer vector of years to download.
token: A bearer token string from earthdata_token().
force: Logical. Re-download even if cached. Default FALSE.

Value

A named list of SpatRaster objects, keyed by year.

Details

Requires a NASA Earthdata bearer token, see earthdata_token().

Examples

if (FALSE) { # \dontrun{
token <- earthdata_token()
rasters <- ntl_download("viirs", region = "IND", years = 2020:2023, token = token)
panel <- extract_panel(rasters, get_india_admin("district"))
} # }