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Boundaries
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Lewis & Clark
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1. Portland 1901
C.H. Crocker Co. This map shows the historic paper map published by C.H. Crocker Co. of Portland and Beaverton, Oregon. Georeferenced using Oregon North State Plan ... Harvard Geospatial Library.
2. Portland County Lines
Metro Data Resource Center. Clackamas, Clark, Multnomah, Washington, Polk, Columbia, Marion and Yamhill county boundaries in Oregon and Clark, Cowlitz, Skamania county boundar... Metro Data Resource Center (Or.).
3. Portland Urban Growth Boundary (UGB)
Metro Data Resource Center. The boundary controls urban expansion onto farm and forest lands. Metro is responsible for managing the Portland metropolitan region's urban growth... Metro Data Resource Center.