This map is an 1866 map of portland's trolley system, all centered around the Willamette River. Map was found in Portland's "Archives and Records M... Lewis & Clark College (Portland, Or.).
Port of Portland. Map showing wharves along Portland's Willamette River issued by Port of Portland in February 1912. .
Lewis & Dryden. A historical raster map of Portland Streets originally mapped in 1892 by Lewis & Dryden. Lewis & Clark College.
Geological Survey. This topographical map is a compilation of four Geological Survey Portland maps published in 1964. Georeferenced to fit Oregon North State Plane (... Harvard Map Collection.