Illinois Department of Natural Resources Illinois Natural History Survey Illinois State Geological Survey 1994 1.1 vector digital data ISGS GIS Database GISDB.IL_INFRA_ROADS_State_Routes_Ln Champaign, Illinois Illinois State Geological Survey http://www.isgs.illinois.edu/ http://illinois.edu This data set contains state routes in Illinois. This is a subset of the All_Roads feature class. Note that the functional classification of roadways is the jurisdiction of the Illinois Department of Transportation and is subject to change. For more current road information, including downloadable GIS data, refer to the Illinois Department of Transportation Technology Transfer Center (IDOT T2 Center) at http://dot.state.il.us/blr/t2center1.html. Data were 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. Major highways were updated as of 1993. The maximum estimated error in horizontal position based on National Map Accuracy Standards is 167 feet. Attributes include up to three state route numbers. The data are stored in geographic coordinates, NAD83. These data have not been updated since 1993, nor are there current plans to do so. This metadata file was originally written by staff of the INHS. Maintenance of the metadata was transferred to ISGS circa 1996. In a natural resources context, state routes 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 regional thematic analysis. They are not appropriate for local analysis or as a geodetic or engineering base. This dataset serves as an important base cartographic element for many types of maps and has been widely distributed and used outside the ISGS. The data set was not and is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS as a reference base layer for maps, the data set has no legal basis in the definition of boundaries or property lines. Edition 1.0 of this dataset was updated by conversion to the ArcSDE data storage model and metadata update. 1994 publication date Complete None planned none infrastructure expressway highway interstate route toll road road none Illinois ISGS information must be obtained directly from the ISGS or from an authorized distributor. Be aware that ISGS information obtained from an unauthorized third party may have been altered subsequent to original distribution, or may no longer be current. Any access to these data, Web sites, computer systems, electronic services, and electronic networks is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section. ISGS information is the property of and copyrighted by the Board of Trustees of the University of Illinois with all rights reserved.  University copyright policy is stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4. A link is provided in the Cross References section. Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, isgs@isgs.illinois.edu. License fees and a license agreement may be required, depending on the proposed usage. Any use of these data is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section. Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data.  Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor. The data do not replace the need for detailed site-specific studies. Please refer to the Distribution Information section. GIS Processing: INHS Staff Documentation: INHS and ISGS staff Quality Control: INHS Staff ArcSDE 9.1 on Oracle 10g http://www.isgs.illinois.edu http://www.vpaa.uillinois.edu/policies/web_privacy.cfm http://www.uillinois.edu/trustees/rules.cfm#sec34 http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html No report. No report. No statement of completeness was provided with the original USGS DLG data. Visual inspection and use suggests this dataset was comprehensive in 1993. All Illinois state routes contained in the source USGS 1:100,000 DLG files are included. Some updates were made in 1993. Any new state routes since 1993 are not included. For more current road information, including downloadable GIS data, refer to the Illinois Department of Transportation Technology Transfer Center (IDOT T2 Center) at http://dot.state.il.us/blr/t2center1.html. It is assumed accuracy is equal to that of 1:100,000 analog source maps based on USGS National Map Accuracy Standards. No accuracy statement was provided with the source maps. US Geological Survey 1980-1986 100000 digital file 1980 1986 publication date none Location of Illinois state routes as contained in the USGS 1:100,000 DLG files 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 Coverage stroutes from ISGS GISDB archive reprojected from customary ISGS Lambert projection, NAD27 to geographic coordinates, NAD83, double-precision. That coverage was imported into ISGS SDE enterprise database, following steps outlined in ISGS procedure GISDB_0009. Field names including the pound-sign character were renamed to eliminate that character (not allowed by Oracle). The STATE# field contained up to 3 route designations for any given line. It was dropped and the route numbers were segregated into existing field STATE_1 and new fields STATE_2 and STATE_3. Spatial index grid size was set at 0.9 degrees. Metadata was updated. 20040225 Vector String 1198 0.000001 0.000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Attribute items are in typical ArcSDE feature class format. Those requiring additional explanations are: STATE_1, STATE_2, and STATE_3 The value is equal to the designated number of the route. Three fields are used to account for areas where several routes overlap. A line may have up to three numerical designations. Any route having a value for STATE_2 or STATE_3 should also have a value for STATE_1. All lines have at least one route number. Values are from DLG files, 1980-86, USGS and IDOT county base map series. none Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-4747 217-785-0211 isgs@isgs.illinois.edu 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time Refer to the Legal Notices of Terms and Conditions of the University of Illinois Web Privacy Policy (there is a link in the Cross References section) for policy statements regarding the following: Disclaimer of Liability Disclaimer of Warranties and Accuracy of Data Disclaimer of Endorsement Disclaimer for External Links Disclaimer of Duty to Continue Provision of Data Security Choice of Law By obtaining these data you agree to the provisions of the University of Illinois Web Privacy Policy, regardless of the manner in which the information was obtained. The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however, ESRI formats can be imported into many different GIS software packages. It is expected that customers who obtain these data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind. 20090224 Please refer to the Distribution Information section. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time The access constraints as stated for the data apply also to the metadata. Refer to the Access Constraints section of the Identification Information section. The use constraints as stated for the data apply also to the metadata. Refer to the Use Constraints section of the Identification Information section. http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile