Download Item (1.3 MB)
Sources: 1940 urbanization redrawn from maps in The Three Basic Services; 2016 developed land redrawn from Portland Metro, Regional Land Information System.
Taylor, Zack, "Figure 7.2 Administrative boundaries and urbanization in Portland and the Willamette Valley.pdf" (2019). Shaping the Metropolis: Institutions and Urbanization in the United States and Canada by Zack Taylor. 23.