Interstates and Toll Roads in Illinois

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Illinois Department of Natural Resources
Originator: Illinois Natural History Survey
Originator: Illinois State Geological Survey
Publication_Date: 1996
Title: Interstates and Toll Roads in Illinois
Edition: 1.2
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: ISGS GIS Database
Issue_Identification: GISDB.IL_INFRA_ROADS_Interstates_Ln
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Online_Linkage: <http://www.isgs.illinois.edu/>
Online_Linkage: <http://illinois.edu>
Description:
Abstract:
This dataset contains interstates and toll roads for 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 1996. (Editor's note - In the metadata for sibling feature classes this range is given as 1980-1986. Correct or typo?) Major highways were updated as of 1996. (Editor's note - In the metadata for sibling feature classes this date is given as 1993. Correct or typo?) The maximum estimated error in horizontal position based on National Map Accuracy Standards is 167 feet. Attributes include up to three interstate route numbers.

The data are stored in geographic coordinates, NAD83.

These data have not been updated since 1996 (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.

Purpose:
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 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.

Supplemental_Information:
Edition 1.0 of this dataset was updated to 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.

Edition 1.1 of this dataset was updated by conversion to the ArcSDE data storage model and metadata update.

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1996
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -91.50365772
East_Bounding_Coordinate: -87.41759666
North_Bounding_Coordinate: 42.49181859
South_Bounding_Coordinate: 36.98415011
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: infrastructure
Theme_Keyword: expressway
Theme_Keyword: highway
Theme_Keyword: interstate
Theme_Keyword: route
Theme_Keyword: defense highway
Theme_Keyword: toll road
Theme_Keyword: road
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Illinois
Access_Constraints:
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.

Use_Constraints:
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.

Point_of_Contact:
Contact_Information:
Contact_Instructions: Please refer to the Distribution Information section.
Data_Set_Credit:
Coverage construction: ISGS and INHS staff Latest feature updates: ISGS staff Documentation: ISGS and INHS staff Quality Control: ISGS and INHS staff
Native_Data_Set_Environment: ArcSDE 9.1 on Oracle 10g
Cross_Reference:
Citation_Information:
Title: ISGS Terms of Use
Online_Linkage: <http://www.isgs.illinois.edu>
Cross_Reference:
Citation_Information:
Title: University of Illinois Web Privacy Notice
Online_Linkage: <http://www.vpaa.uillinois.edu/policies/web_privacy.cfm>
Cross_Reference:
Citation_Information:
Title:
University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4)
Online_Linkage: <http://www.uillinois.edu/trustees/rules.cfm#sec34>
Cross_Reference:
Citation_Information:
Title:
Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign
Online_Linkage: <http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html>

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: No report.
Logical_Consistency_Report: No report.
Completeness_Report:
No statement of completeness was provided with the original USGS DLG data. Visual inspection and use suggests this was comprehensive in 1996. All interstates and toll roads contained in the source USGS 1:100,000 DLG files are included. Some updates were made in 1993 and 1996. Any new interstate highways 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>.

Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
It is assumed 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 maps.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: 1980-1991
Title:
US Geological Survey 1:100,000 Digital Line Graph files, transportation layer
Source_Scale_Denominator: 100000
Type_of_Source_Media: digital file
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1980
Ending_Date: 1991
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: none
Source_Contribution:
Location of interstate roads as contained in the USGS 1:100,000 DLG files
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: varies
Title: US Geological Survey 1:24,000 topographic quadrangles
Source_Scale_Denominator: 24000
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: varies
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: none
Source_Contribution:
Update information for I-72 from west of Springfield to the state line (Quincy), and the Elgin-O'Hare Expressway
Process_Step:
Process_Description:
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.
Process_Date: 1980-1986
Process_Step:
Process_Description:
Major highways were updated as of 1993 by the Illinois Natural History Survey.
Process_Date: 1993
Process_Step:
Process_Description:
The 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 the coverage and route values were updated in the items as appropriate. Updates were also made from USGS 1:24,000 topographic quadrangles.
Process_Date: 1996
Process_Step:
Process_Description:
Coverage intstate 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 INTERST# field was dropped as it was redundant with INT_1, INT_2, and INT_3.

Spatial index grid size was set at 0.9 degrees.

Metadata was updated.

Process_Date: 20040225
Process_Contact:
Contact_Information:
Contact_Person_Primary:

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 381

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Attribute items are in typical ArcSDE feature class format. Those requiring additional explanations are:

INT_1, INT_2, and INT_3 The value is equal to the designated route number of the interstate. Three fields are used to account for areas where several interstates overlap. A line may have up to three numerical designations. Any route having a value for INT_2 or INT_3 should also have a value for INT_1. All lines have at least one route number, with a single exception: The Elgin-O'Hare Expressway had not been officially numbered when the dataset was last updated. 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. Values are 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. When the dataset was last updated, no portions of the interstate system overlapped with the Illinois highway system.

Entity_and_Attribute_Detail_Citation: none

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois
Contact_Address:
Address_Type: mailing and physical address
Address: 615 East Peabody Drive
City: Champaign
State_or_Province: Illinois
Postal_Code: 61820
Country: USA
Contact_Voice_Telephone: 217-333-4747
Contact_TDD/TTY_Telephone: 217-785-0211
Contact_Electronic_Mail_Address: isgs@isgs.illinois.edu
Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time
Distribution_Liability:
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.

Technical_Prerequisites:
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.

Metadata_Reference_Information:
Metadata_Date: 20090224
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Instructions: Please refer to the Distribution Information section.
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints:
The access constraints as stated for the data apply also to the metadata. Refer to the Access Constraints section of the Identification Information section.
Metadata_Use_Constraints:
The use constraints as stated for the data apply also to the metadata. Refer to the Use Constraints section of the Identification Information section.
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Illinois Natural Resources Geospatial Data Clearinghouse

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