Matches a data frame with longitude and latitude to an sf object

Usage

ll_match(
  data,
  longitude = 1,
  latitude = 2,
  join = sf::st_intersects,
  sample = NULL,
  match = longlat2map::ll_get_world()
)

data: A data frame or tibble with a column for longitude and one for latitude or an onject of the sf class. If an sf object is given, the longitude and latitude parameters are ignored.
longitude: The exact column name or the column index (e.g. 1 if first column) for longitude. Defaults to 1.
latitude: The exact column name or the column index (e.g. 1 if first column) for latitude. Defaults to 2.
join: A function of the sf class determining the type of join. Defaults to sf::st_intersects. Check ?sf::st_join for alternatives.
sample: Defaults to NULL. If given, it runs the matching with only a subset of the original dataframe. Suggested for testing in particular when working with big datasets.
match: An sf object to be matched with the given dataframe, defaults to longlat2map::ll_get_world(). This package facilitate obtaining alternative reference maps with functions such as longlat2map::ll_get_nuts_eu() and longlat2map::ll_get_nuts_us()

An sf object with CRS 4326.