Your County Surveyor is a constitutional officer of the county and is elected to a 4-yr term from the county at large. LEGAL SURVEY BOOK - the County Surveyor maintains a legal survey record book for all legal surveys within the county. A legal survey is a survey prepared by a registered land surveyor with notice to all adjoining landowners to resolve property disputes. SECTION CORNER PERPETUATION - the County Surveyor must keep and maintain a corner record book showing original government section corners.