Page:Geographic Areas Reference Manual (GARM).pdf/301

 In machine-readable data products, each UA is identified by a four-digit numeric code and name. Where an MA and a UA have the same name, the UA code and the MA code are identical. If MA title cities represent multiple UAs, or the UA title city does not correspond to the first name of an MA title, the Census Bureau has assigned a code based on the alphabetical sequence of the UA title in relationship to the other UA and MA titles.

In the 100-percent data products, the rural classification is subdivided into two categories: places of less than 2,500 outside UAs (rural places), and not in places. The not in places category comprises (1) rural territory, population, and housing units outside incorporated places and CDPs, and (2) the rural portions of extended cities. In many data products, the term other rural is used; other rural is a residual category specific to the classification of the rural population and housing units in each data product.

In the sample data products, rural population and housing units are subdivided into rural farm and rural nonfarm. Rural farm comprises all rural households and housing units on farms (places from which $1,000 or more of agricultural products were sold in 1989); rural nonfarm comprises the remaining rural population and housing units.

The Census Bureau has produced individual Urbanized Area Boundary Maps. These maps are electrostatically plotted and portray the UA boundary and the names of all UA boundary features, along with the boundaries of States, counties, county subdivisions (MCDs and CCDs), AIANAs, places, and selected base map features such as major interstate and Federally maintained highways and water bodies. The format usually features a single UA on a standard paper map sheet (not to exceed 36 inches by 42 inches).

The Census Bureau also offers a machine-readable TIGER UA Limit™ file on magnetic tape. This national file contains a digital representation of the geographic coordinates for all linear features in the TIGER data base Notes and References Urban and Rural Classifications12-21