S.D. Codified Laws § 10-10-4

The person employed to make the classification under the provisions of §§ 10-10-1 and 10-10-2 shall procure a list of all real estate within the county subject to taxation. He shall secure and compile data concerning the listing of property within said county and prepare such data from public records and such other sources as may be available, so as to enable him to list accurately all property located within the county. It shall be his duty to compile information as to land acquired from the government by individuals or corporations for the purpose of listing and making a valuation thereof for the purpose of taxation.