Hst 494: Historic Portland Maps: USGS Historical Maps
Guide created in support of Dr. Schechter's Winter 2022 Course on the History of Portland
USGS Historical Topographic maps
To see changes in topography over time, use the USGS Historical Topographic Maps Explorer.
1) Zoom in on the part of the map you're interested in exploring.
2) Zoom in and click the area of interest.
3) At the bottom of the screen, select the year of interest.
