Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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You searched for: Publisher Illinois State Geoligical Survey Remove constraint Publisher: Illinois State Geoligical Survey Collection Illinois Geospatial Data Clearinghouse Remove constraint Collection: Illinois Geospatial Data Clearinghouse
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1. Mosaic of Illinois 7.5-minute Digital Raster Graphic (DRG) Images, 2003

2003. Illinois State Geological Survey. This is a statewide ArcSDE Raster Mosaic of USGS DRG images of 7.5-minute topographic quadrangles occurring in Illinois. These are unmodified DRG i...