Year: 1941 / Publisher: Geological Survey Division (Urbana, Ill.) / Bounding Box: -40.000931 39.999015 -39.999064 40.000987 - NYU Spatial Data Repository Search Results

Start Over Year 1941 Publisher Geological Survey Division (Urbana, Ill.) Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Illinois-Iowa, Keithsburg quadrangle

1941. Geological Survey (U.S.). Contour intervals 10 and 20 feet changing on the 580 foot contour.;"Culture and drainage in part compiled from aerial photographs taken by Air Corp... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2. Iowa-Illinois Miles quadrangle

1941. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1935.";Relief shown by contours and spot heights.;Shows roadway classification as of 1940.;1 map, colored;45... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).