Various query arguments. See http://www.geonames.org/
for details
Value
List or data frame objects with the query results.
Details
These functions query geonames for information about
postal codes. Note that geonames only supports postal code
lookups in a limited number of countries. The supported
country info is returned by GNpostalCodeCountryInfo.
See http://www.geonames.org/export/ws-overview.html
for a full description of valid arguments and return
values.