Illinois State Geological Survey 1998 1.0 map ISGS GIS Database file name conforms to USGS naming conventions Champaign, Illinois Illinois State Geological Survey NOTICE: THIS IS NOT the official USGS metadata file for DRGs. This is an Illinois Department of Natural Resources metadata entry intended to describe changes made to the original DRG image. You are encouraged to consult the original USGS metadata file. This metadata file describes a suite of USGS DRGs in Illinois that have been reprojected to a Lambert Conformal Conic Projection. This set is commonly referred to as "Lambert projection, collar intact." With the exception of projection, the images are identical to those distributed by the USGS. Horizontal datum is NAD27. Map units are feet. The new projection information included in this metadata file supersedes that specified at the lower left on the collar of the map image. Each image has an associated georeferencing file with a .tfw extension. The naming convention conforms to that used by the USGS. The Illinois Department of Natural Resources does not maintain a separate metadata file for individual DRGs. This metadata file applies to all the images in this set. This set currently includes 7.5-minute (1:24,000 scale) DRGs. Note that the bounding coordinates reported below are for the entire state of Illinois, not for any single quadrangle. These images are made available on-line as a service to interested data users. They provide suitable base map information for many mapping applications. The images are appropriate for use at a regional scale and are intended as a reference. The images are not appropriate for use at scales greater than 1:24,000, nor as a geodetic or engineering base. none varies, refer to original USGS metadata Ground Condition Complete none -91.625 -87.375 42.625 36.875 none digital raster graphic drg quadrangle usgs topographic image none Illinois none Acknowledgment of the USGS, Illinois DNR, and the Illinois State Geological Survey (ISGS) would be appreciated in products derived from these data. Illinois State Geological Survey Information Office mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-4747 217-785-0211 217-244-0802 isgs@isgs.uiuc.edu 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time Raster Pixel approx. 5500 approx. 4350 Lambert Conformal Conic 33 0 0.000 45 0 0.000 -89 30 0.000 33 0 0.000 914400.00000 meters 0.00000 coordinate pair unknown unknown feet NAD27 CLARKE1866 6378206.4 meters 294.98 Each raster entity or pixel contains a color index from 0 through 12 referencing a color palette of RGB values from 0 through 255 in which the standard colors used in the DRG are defined. > USGS DRG Color Palette > > Digital Number Color Red Green Blue > > 0 Black 0 0 0 > 1 White 255 255 255 > 2 Blue 0 151 164 > 3 Red 203 0 23 > 4 Brown 131 66 37 > 5 Green 201 234 157 > 6 Purple 137 51 128 > 7 Yellow 255 234 0 > 8 Light Blue 167 226 226 > 9 Light Red 255 184 184 > 10 Light Purple 218 179 214 > 11 Light Grey 209 209 209 > 12 Light Brown 207 164 142 > Draft Standards for Digital Raster Graphic. Illinois State Geological Survey Information Office mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-4747 217-785-0211 217-244-0802 isgs@isgs.uiuc.edu 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time The ISGS may distribute USGS DRGs, but they must be accompanied by the original metadata file and any changes that have been made to the data must be specifically indicated. The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR. 19990304 19990304 20010304 Illinois State Geological Survey Information Office mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-4747 217-785-0211 217-244-0802 isgs@isgs.uiuc.edu 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 none none