Exploration of an academic study of urban structure and density described in the June 2014 article, "From Jurisdictional to Functional Analysis of Urban Cores & Suburbs" in new geography.
Created from the "zip code tabulation area" (ZCTA) TIGER/Line® with Selected Demographic and Economic Data product in Geodatabase format.
- Urban (pre-auto urban core): density > 2,900 sq. km
- Auto suburban, early: median house built 1946 to 1979, density < 2,900 sq. km and density > 100 sq. km
- Auto suburban, later: median house built after 1979, density < 2,900 sq. km and density > 100 sq. km
- Auto exurban: all others