Illinois-Indiana, Ridge Farm quadrangle : 15-minute series.

Description:

Contour interval 20 feet.;"Mapped by the Geological Survey 1945";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500

Creator:

Geological Survey (U.S.)

Publisher:

Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.)

Provider:

University of Illinois Urbana-Champaign

Temporal Coverage:

1947

Spatial Coverage:

Illinois and Indiana

Access Rights:

Public

Format:

JPEG2000