Geological Survey (U.S.). Eastern Mapping CenterBlue line print. "March 1978." Hand annotated in red ink to show High altitude photography (HAP) sectors for photography in 1977 and 1979 with notation "flight height 40,000'."Imprint: [Reston, Va.] : The Center, [1979?]Dimensions: 47 x 31 cm; Scale: 1:1,000,000Coordinates: W0880700 W0844500 N0414500 N0375200JPEG9ca9f47d-0b93-410a-a9f4-2ff5f6ed07f8G4091.A43 1979 .G4engGeological Survey (U.S.). Eastern Mapping CenterPublicAerial photographsIndiana, index base mapMapsIndiana1979?Indiana University