For this bulletin, mobile homes are classified as single family detached units. Single-Family Attached units are identified including duplexes and row houses. Multi-Family units are identified including apartments and group quarters. Non-residential uses of Manufacturing, Commercial, and Community Services are often hard to distinguish from aerial photography. These uses are not as often separated as they once were.
Transportation includes areas devoted to rail, air, marine, and highway transportation.
Highways are included only when they are double land divided. For this bulletin, parking is included in the transportation category, regardless of its attendant land use. The portion of recreations or cultural areas that can be identified on an aerial photograph will most likely not conform to the site boundary. Such information is derived from other sources. Agricultural includes land devoted to crops, pastures, orchards, tree farms, or other agricultural uses.