Illinois State Geological Survey 1996 - not published 1.1 map IDNR GIS Database intstate Champaign, Illinois Illinois State Geological Survey Downloadable Data (Shift-Click to download data file) <URL:http://www.isgs.uiuc.edu/nsdihome/browse/statewide/intstate.e00> Browse Graphic (GIF) Screen-size image representing the nature of the data. <URL:http://www.isgs.uiuc.edu/nsdihome/browse/statewide/intstateb.gif> Text (.txt) version of this Metadata file. (Shift-Click to download documentation) <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/intstate.txt> HTML (.html) version of this Metadata file. (Shift-Click to download documentation) <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/intstate.html> This data set contains interstates and toll roads for Illinois. This is a subset of the roads data set stored by county. Note that the functional classification of roadways is the jurisdiction of the Illinois Department of Transportation and is subject to change. Data are derived from the US Geological Survey 1:100,000 Digital Line Graph files, transportation layer, 1980-1986. Publication dates of the USGS maps used as sources range from 1980 to 1996. Major highways were updated as of 1996. The maximum estimated error in horizontal position based on National Map Accuracy Standards is 167 feet. Attributes include up to three interstate route numbers. In a natural resources context, interstates and toll roads are primarily used as a cartographic element on maps for spatial reference. They are also used for analyses that require, for example, a buffer area between roads and natural features. These data are appropriate for use in local and regional thematic analysis. They are not appropriate as a geodetic or engineering base. Updates to this coverage from edition 1.0 include the additions of attribute items US# and STATE#, the addition of I-72 from west of Springfield to the state line (Quincy), and the Elgin-O'Hare Expressway. 1996 publication date complete none planned -91.50365772 -87.41759666 42.49181859 36.98415011 none infrastructure expressway highway interstate route defense highway toll road road none Illinois none Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensees' organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes, related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of the appropriate custodial division within DNR. Any hardcopies utilizing DNR data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent DNR data sets, nor to imply that changes they made were approved by DNR. These data are not to be used for commercial profit. 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 > Coverage construction: ISGS and INHS staff > Latest updates: B. Stiff, P. Weibel > Documentation: D. Nelson, P. Weibel, and S. Beaverson > Quality Control: ISGS and INHS staff SunOS, 5.5.1, sun4m UNIX ARC/INFO version 7.0.4 Illinois Department of Natural Resources 1994 IDNR GIS Database stroutes Champaign, Illinois Illinois Department of Natural Resources Data Set Documentation <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/stroutes.html> Illinois Department of Natural Resources 1994 IDNR GIS Database ushways Champaign, Illinois Illinois Department of Natural Resources Data Set Documentation <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/ushways.html> not available Chain-node topology present. Data set is topologically structured linear data with nodes at all intersections. Pseudo nodes (nodes between arcs with common attribute values across all non-system attribute fields) may exist on some arcs. No statement of completeness was provided with the original USGS DLG data. Visual inspection and use suggests that coverage is comprehensive but reflective of the date of source map publication date. This date varies across the state. All interstates and toll roads contained in USGS 1:100,000 DLG files are included. In general, accuracy is equal to that of 1:100,000 analog source maps based on USGS National Map Accuracy Standards. Some updates were taken from USGS 7.5' topographic quadrangles. These updates are within one line-width of the corresponding line on the source map. No accuracy statement was provided with the source map. US Geological Survey 1980-1991 100000 digital file 1980 1991 publication date none Location of interstate roads as contained in the USGS 1:100,000 DLG files US Geological Survey varies 24000 paper varies publication date none Update information for I-72 from west of Springfield to the state line (Quincy), and the Elgin-O'Hare Expressway Derived from the US Geological Survey 1:100,000 Digital Line Graph files, transportation layer, 1980-1986. Publication dates of the USGS maps used as sources range from 1980 to 1986. 1980-1986 Major highways were updated as of 1993 by the Illinois Natural History Survey. 1993 This coverage was clipped on January 1, 1996 to exclude arcs extending beyond the Illinois state boundary, using the coverage re-state1. Additional updates occurred on June 10, 1996 by the Illinois State Geological Survey, again using the USGS 1:100,000 DLGs. Arcs were selected from the DLGs and appended to this coverage and route values were updated in the items as appropriately needed. Updates were also made from USGS 1:24,000 topographic quadrangles. 1996 Vector String 381 Lambert Conformal Conic 33 45 -89.5 33 914400.00000 meters 0.00000 coordinate pair not determined not determined feet NAD27 Clarke 1866 6378206.4 meters 294.98 Attribute items are in typical ARC/INFO feature class format. Those requiring additional explanations are: Arc Attributes: INTERST# - The value is equal to the designated route number of the interstate. Where several interstates overlap, the value includes all designated route numbers separated by a zero. For example, 70057 indicates that the arc represents a portion of the interstate that is designated both as I-57 and I-70. There is a single exception: The Elgin-O'Hare Expressway has not been officially numbered. Valid values are 24, 39, 55, 57, 64, 70, 72, 74, 80, 88, 90, 94, 155, 172, 180, 190, 255, 270, 290, 294, 355, and 474. INTERST# - Redefined to INT#1, INT#2, INT#3 INT#1, INT#2, and INT#3 - Interstate route numbers Route numbers are contained in a single item which is subsequently redefined to deal with coincident routes (routes carrying more than one highway route number). Any route having a value for route 2 or 3 should also have a value for route 1. from DLG files, 1980-86, USGS and IDOT county base map series. US# - The value is equal to the US highway route where the arc represents both a portion of the interstate system and the US highway system. If one or more US highways overlap the interstate, the value includes all designated route numbers separated by a zero. Valid values are 6, 36, 40, 50, and 51. STATE# - The value is equal to the Illinois highway route where the arc represents both a portion of the interstate system and the Illinois highway system. Currently, no portions of the interstate system overlap with the Illinois highway system. none 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 An Arc/Info .e00 (export) file is currently available free of charge at the Illinois Natural Resources Geospatial Data Clearinghouse. Refer to the Citation Information portion of this file for access to downloadable data and metadata, and a visual (GIF image) representation of the data. 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. 19980731 19980731 20008 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