Illinois Digital Raster Graphics Files
1:250,000 DRGs 1:100,000 DRGs
1:24,000 DRGs Projection/Format
Illinois Natural Resouces Geospatial Data Clearinghouse

Download a DRG: Specify name or USGS index number

Currently, only one DRG can be downloaded at a time. Javascript must be enabled on your browser.


STEP 1. Select projection and format:
Learn more about projection and format choices.

Flavor 1 - Original USGS DRG in default UTM zone and datum
Flavor 2 - DRG reprojected to Lambert Conformal Conic, NAD27, collar intact
Flavor 3 - DRG reprojected to UTM Zone 16, NAD83, collar cropped (tiled)
Flavor 4 - DRG reprojected to Lambert Conformal Conic, NAD27, collar cropped (tiled)


STEP 2. Select scale and quadrangle:
Click a button to activate a scrolling list. Only the selection in the activated scrolling list will apply.

1:24,000 - Select by quad name:

1:24,000 - Select by index number:

1:100,000 - Select by quad name:
Available in flavors 1 and 3 only.

1:100,000 - Select by index number:
Available in flavors 1 and 3 only.

1:250,000 - Select by quad name:
Available in flavors 1 and 3 only.

1:250,000 - Select by index number:
Available in flavors 1 and 3 only.


STEP 3. Select a compression method:
Zipped      Tar and gzip


STEP 4. Submit request or reset form.
It should take 30 seconds or less to assemble your download bundle. However, it may take two minutes or more, especially during peak times, or if you have chosen a quadrangle in the greater Chicago metropolitan area.

      What will the data bundle contain?



This clearinghouse is maintained by the Illinois State Geological Survey.

Illinois Department of Natural Resources | State of Illinois