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.).
Oregon Metro. Aerial map or Portland metro area derived from ortho-rectified digital images, covering 602 square miles at 6 inch resolution. Map from Oregon Metr... Lewis & Clark College (Portland, Or.).
Edward H. Bennett and PDXscholar. This map is of the existing and proposed block plan in 1909, from the Greater Portland Plan. . Lewis & Clark College (Portland, Or.).