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Understand geographic components
A geographic component is the portion of a geographic area (e.g., Texas) that meets a location-based test such as in a metropolitan area or in a rural place. For example, the geographic component of "in metropolitan area" for Texas combines the land area of El Paso, TX MSA, San Antonio, TX MSA and all other metropolitan areas in Texas into a single collective identity.
The Census Bureau recognizes about 100 different geographic components, with most focusing on urban/rural or metropolitan/non-metropolitan distinctions. Geographic components are only available for some types of geographic areas (e.g., state, region). The specific geographic components available for one geographic type may be different from those available for another geographic type.
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