For more than one layer, accepts a comma separated list of valid layers. If any of those layers is invalid, the request will still be honored, but a warning will be thrown in the `geocoding` block of the response.
required:false
collectionFormat:csv
- name:boundary.country
in:query
type:string
format:string
required:false
description:Limits search to only return matches within a specific country. Accepts 2 or 3 letter country codes based on ISO [Alpha-2](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Current_codes) or [Alpha-3](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Current_codes) abbreviations.