Triangulation diagram, vicinity of Washington, D.C.; 1966.
>>>WTF is this for planefags?
>>>JP2 at link hi-res.
https://www.loc.gov/item/87693486/
Map of the city of Washington showing the location of sewers:1888.
https://www.loc.gov/item/87695545/
Triangulation diagram, vicinity of Washington, D.C.; 1966.
>>>WTF is this for planefags?
>>>JP2 at link hi-res.
https://www.loc.gov/item/87693486/
Map of the city of Washington showing the location of sewers:1888.
https://www.loc.gov/item/87695545/