Format: JPEG2000 / Publisher: Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill) / Bounding Box: -86.51116 39.149274 -86.508949 39.150938 - GeoBlacklight Search Results

Start Over Format JPEG2000 Publisher Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill) Bounding Box -86.51116 39.149274 -86.508949 39.150938

1. Illinois, Potomac quadrangle.

1936. Geological Survey (U.S.). Contour interval 10 feet;"Surveyed in 1931-1932";(W 88⁰00ʹ00ʺ--W 87⁰45ʹ00ʺ/N 40⁰30ʹ00ʺ--N 40⁰15ʹ00ʺ);Relief shown by contours and spot heights.;Sho... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill).

2. Indiana-Illinois, Vincennes quadrangle : topography

1915. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1911-1913.";"Surveyed in cooperation with the State of Illinois."; (W 87⁰45ʹ00ʺ--W 87⁰30ʹ00ʺ/N 38⁰45ʹ00ʺ--N ... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill).