
Portland and its surrounding southern reaches appear in sharp detail through this mid-1970s orthophotograph, which uses aerial imagery to document the suburban and industrial expansion of the era. The confluence of the Willamette River and the Clackamas River anchors the southern portion of the sheet, providing a clear view of the natural waterways that shaped the development of Gladstone and the community of Clackamas. Rising above the residential grids and the developing highway corridors is Mount Scott, which stands as a significant topographic landmark amidst the intensifying urban sprawl. This imagery, produced by the Geological Survey in cooperation with the Soil Conservation Service, captures the specific land use patterns of 1975, showing the transformation of previously open tracts into the modern metropolitan footprint seen today.
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This is the sole edition of this map. No revisions or reprints were ever made.
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