Extract ANSP polygon at defined flight level
Arguments
- ansps
the
sf
holding the ANSP polygons, i.e.pruatlas::ansps_ace_406
- ansp_id
optional, the ANSP ID of the relevant country, "ENAV" otherwise. It can be a regular expression, i.e. "DFS|ENAV" for matching Germany and Italy.
- fl
the flight level of interest
Examples
if (FALSE) { # \dontrun{
country_ansp(ansps_ace_406, "DFS", fl = 350)
# more complicated for Italy/ENAV: there is a hole over Rome.
# if we want to get rid of it we can use smoothr::fill_holes()
enav <- pruatlas::ansps_ace_406 %>%
country_ansp(ansp_id = "ENAV", fl = 355) %>%
smoothr::fill_holes(units::set_units(10000, km^2))
} # }