5. Cadastral Map

http://landscapeandurbanism.blogspot.com/2009/12/historic-portland-maps-1852-cadastral.html

Cadastral maps show the boundaries and ownership of land. This map is part of the Public Lans Survey System for Portland, Oregon from 1852. (You can see the baseline at the top of the map.) It shows the boundaries and ownership of the parcels of land near the river as well as some topographical information.