Metro is the directly elected regional government serving Clackamas, Multnomah and Washington counties and the 24 cities that make up the Portland metropolitan area. Portland State owns several products of its Data Resource Center:

Maps:
Map Case-16, Drawer 6.
Undeveloped Land: Portland Metropolitan Area map, Zoning: Portland Metropolitan Area map, etc..

 

Aerial photos:
Map Case-16, Drawer 7.
Set of 257 aerial photo maps of the Metro Area. Each photo-map covers four sections from the township/range section grid. There is an Index to Aerial Photographs filed in the drawer.

 

For a comprehensive listing of Metro's Data Resource Center products see its:

Data Resource Center Catalog

Shelved with the map indexes behind the reference desk on the 5th floor.