hub: The KiWIS database you are querying. Either one of the defaults or a URL. See README.
search_term: (Optional) A station name to search for. Supports the use of * as a wildcard. Case doesn't matter.
bounding_box: (Optional) A bounding box to search within for stations. Should be a vector or comma separated string.
group_id: (Optional) A station group id (see ki_group_list). with the following format: (min_x, min_y, max_x, max_y).
return_fields: (Optional) Specific fields to return. Consult your KiWIS hub services documentation for available options. Should be a comma separate string or a vector.
datasource: (Optional) The data source to be used, defaults to 0.