A data frame with the following fields
- name
the country name, e.g. "Italy"
- iso3c
the 3-letter ISO code, e.g. "ITA"
- iso2c
the 2-letter ISO code, e.g. "IT"
- icao
the 2-letter ICAO code, e.g. "LI"
- iso3n
the 3-digits ISO code, e.g. "380"
- date
the date of
status
code, e.g. 1996-04-01- status
the status code, e.g. "M" (
M
Member State,C
Comprehensive Agreement State,T
Transitional State, NA for Kosovo)
These are useful to grab the right spatial polygons in case of need.