Cook County Board of Commissioner's 2001 1:1200-Scale Cook County Commissioner District Boundaries. Geodatabase Vector Digital Data. Version 2.0 Published: August 2004.

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Cook County Board of Commissioners
Publication_Date: 200408
Title:
Cook County Board of Commissioner's 2001 1:1200-Scale Cook County Commissioner District Boundaries. Geodatabase Vector Digital Data. Version 2.0 Published: August 2004.
Edition: 2.0
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Chicago, Illinois
Publisher: Cook County Board of Commissioners
Online_Linkage: Not yet available online
Description:
Abstract:
This file is a digital geospatial Environmental Systems Research Institute (ESRI) ArcGIS Version 8.3 polygon feature class that identifies the boundaries of Commissioner districts in Cook County, Illinois.
The original boundary file, created by Election Data Services, has been updated using legal descriptions made available in 2001.
This dataset is projected using the Transverse Mercator map projection. The grid coordinate system used is the Illinois State Plane Coordinate System (Zone Number 1201), NAD83 with ground coordinates expressed in U.S. Survey Feet.
Purpose:
The purpose of this dataset is to indicate the boundary of each Commissioner district in Cook County, Illinois. This dataset was created using aerial photography presented at a scale that permitted the creation of a Commissioner district boundary file with a higher degree of horizontal positional accuracy.
In addition, this data set was created to serve as part of a standard database for virtually all geospatial applications in Cook County, and is intended to support general location, planning, and cartography projects, as well as general inventory and asset management, Census analysis and mapping, and geocoding by address.
Supplemental_Information:
It is recommended that this dataset should not be used at scales larger than 1:1200.
The next expected update to this GIS dataset is 2010.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2001
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -88.264287
East_Bounding_Coordinate: -87.506927
North_Bounding_Coordinate: 42.154379
South_Bounding_Coordinate: 41.468246
Keywords:
Theme:
Theme_Keyword_Thesaurus: Metadata Service Theme Categories
Theme_Keyword: Administrative and political boundaries
Theme_Keyword: Offline data
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Commissioner District Boundaries
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (FIPS 5-2): Washington, DC, National Institute of Standards and Technology.
Place_Keyword: Illinois
Place:
Place_Keyword_Thesaurus:
Illinois Compiled Statutes, 70 ILCS 1705, State of Illinois, 1994
Place_Keyword: northeastern Illinois
Place:
Place_Keyword_Thesaurus:
"Geographic Identification Code Scheme (PHC80-R5)." 1980 Census of Population and Housing, Bureau of the Census, U.S. Department of Commerce, April 1983.
Place_Keyword: Cook County
Access_Constraints: None
Use_Constraints:
Under no circumstances may the data be redistributed or made available over a network without explicit permission from the Cook County Department of Office Technology.
It is required that the Cook County Board of Commissioners be cited in any products generated from the data. The following source citation must be included: "Source: Cook County Board of Commissioner's 2001 1:1200-Scale Cook County Commissioner District Boundaries. Geodatabase Vector Digital Data. Version 2.0 Published: August 2004."
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Cook County Bureau of Information Technology and Automation
Contact_Person: Alan Hobscheid
Contact_Position: GIS Coordinator, Cook County Department of Office Technology
Contact_Address:
Address_Type: mailing and physical address
Address: 69 W. Washington Street
Address: Room 2700
City: Chicago
State_or_Province: Illinois
Postal_Code: 60602
Country: USA
Contact_Voice_Telephone: 312-603-1399
Contact_Facsimile_Telephone: 312-603-9904
Contact_Electronic_Mail_Address: ahobscheid@cookcountygov.com
Hours_of_Service:
09:00 - 17:00, Central Time Zone, Monday - Friday, except holidays
Contact_Instructions: Please contact during normal business hours.
Data_Set_Credit:
Sue Tursman, GIS Analyst, Cook County Department of Office Technology
Native_Data_Set_Environment:
Environmental Systems Research Institute (ESRI) ArcGIS Version 8.x coverage file.

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Repeated usage and inspection of the data have produced results (attributes) that are assessed to be highly accurate.
Logical_Consistency_Report:
The following topology rules were generated for this dataset:
 Must not overlap
 Must not have gaps
Completeness_Report:
This dataset was completed in 2004. It shows all seventeen (17) Commissioner districts for Cook County, IL. An eighteenth district was added to show the Indiana border.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The accuracy of this dataset was dependent upon the level of accuracy of the digital orthophotography that was used to derive the district boundaries.
The digital orthophotography exceeded 0.615019928 meters (2.0 feet) horizontal accuracy at the 95 percent confidence level (Accuracy = RMSEr x 1.7308).
In addition, the horizontal positional accuracy of this dataset was dependent upon the legal descriptions. Legal descriptions are occasionally open to interpretation and occasionally refer to features/structures that did not exist at the time of the production of this GIS dataset.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.615019928
Horizontal_Positional_Accuracy_Explanation: National Standard for Spatial Data Accuracy
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Cook County Board of Commissioners
Publication_Date: 200410
Title:
Cook County Photogrammetry Project, Spring 2003, 1:1200-Scale, Tiled Black and White Digital Orthoimagery for Cook County, Illinois. Raster Digital Data, Version 1.0. Published October, 2004
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:
Publication_Place: Chicago, Illinois
Publisher: Cook County Board of Commissioners
Online_Linkage: Not yet available online
Source_Scale_Denominator: 7920
Type_of_Source_Media: stable-base material
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20030323
Single_Date/Time:
Calendar_Date: 20030330
Single_Date/Time:
Calendar_Date: 20030331
Single_Date/Time:
Calendar_Date: 20030402
Single_Date/Time:
Calendar_Date: 20030412
Single_Date/Time:
Calendar_Date: 20030413
Single_Date/Time:
Calendar_Date: 20030524
Single_Date/Time:
Calendar_Date: 20030323
Single_Date/Time:
Calendar_Date: 20030411
Single_Date/Time:
Calendar_Date: 20030528
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: COOK_ORTHOS_2003

Source_Contribution: Used as a reference in the creation of the district boundaries.
Process_Step:
Process_Description:
CREATION OF THE COMMISSIONER DISTRICT BOUNDARIES
Using legal descriptions, made available in 2001, and Cook County's 2003, 1-1200-Scale black and white digital orthoimagery, Commissioner districts for Cook County were developed from an original base GIS dataset that had been generated using 2000 Census data.
Since legal descriptions take precedence over Census TIGER/Line files, the original GIS file was quality controlled and spatially adjusted as necessary.
Source_Used_Citation_Abbreviation: COOK_ORTHOS_2003
Process_Date: 200408
Source_Produced_Citation_Abbreviation: COMMDIST_2004
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Cook County Bureau of Information Technology and Automation
Contact_Person: Sue Tursman
Contact_Position: GIS Analyst, Cook County Department of Office Technology
Contact_Address:
Address_Type: mailing and physical address
Address: 69 W. Washington Street
Address: Room 2700
City: Chicago
State_or_Province: Illinois
Postal_Code: 60602
Country: USA
Contact_Voice_Telephone: 312-603-1388
Contact_Facsimile_Telephone: 312-603-9904
Contact_Electronic_Mail_Address: sgtursman@cookcountygov.com
Hours_of_Service:
09:00 - 17:00, Central Time Zone, Monday - Friday, except holidays
Contact_Instructions: Please contact during normal business hours.
Cloud_Cover: 0

Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Cook County, Illinois
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 22

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 1201
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999975
Longitude_of_Central_Meridian: -88.333333
Latitude_of_Projection_Origin: 36.666667
False_Easting: 984250.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000512
Ordinate_Resolution: 0.000512
Planar_Distance_Units: survey feet
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

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
This dataset contains a polygon feature class (simple feature type) that represents Commissioner districts in Cook County, Illinois.
Entity_and_Attribute_Detail_Citation:
Cook County Board of Commissioner's 2001 1:1200-scale Cook County Commissioner District Boundaries. Geodatabase Vector Digital Data. Version 2.0 Published: August 2004.
 Data Dictionary: Cook County Board of Commissioner's 2001
 1:1200-Scale Cook County Commissioner District Boundaries.
 Geodatabase Vector Digital Data. Version 2.0 Published: August
 2004.

 Source: Cook County Board of Commissioners
 Format: Data stored in ESRI ArcGIS 8.3
 Feature Types Maintained: Simple
 Geometry Types Maintained: Polygon

--------------------------------------------------------------------

 Feature Class Name: commdist
 Alias: commdist
 Dataset Type: Feature Class
 Feature Type: Simple
 Geometry: Polygon

 Attribute Label  Attribute Definition           Attribute Type
                                            Lth Prec Scale Type Null
 OBJECTID         Internal ID number                       OID
 SHAPE            Feature geometry                         Geo   y
 DISTRICT         Numeric district ID             0        Flt   y
 SHAPE_LENG       Length of feature           0   0        Db    y
 SHAPE_AREA       Area of feature             0   0        Db    y

 Key:  Lth= Length                       Type:   OID= Object ID
      Prec= Precision                          Short= Short Integer
                                                  Db= Double
                                                 Geo= Geometry
                                                 Int= Integer
                                                 Flt= Float

 OBJECTID
 Attribute Definition: Internal ID number
 Attribute Definition Source: ESRI
 Attribute Domain Values:
   Range Domain: 1 to 18

 SHAPE
 Attribute Definition: Feature geometry
 Attribute Definition Source: ESRI
 Attribute Domain Values:
   Enumerated Domain: SHAPE = Polygon

 DISTRICT
 Attribute Definition: District number
 Attribute Definition Source: Cook County Board of Commissioners
 Attribute Domain Values:
   Enumerated Domain: 1 through 18

 Shape_Leng
 Attribute Definition: Length of feature in internal units.
 Attribute Definition Source: ESRI
 Attribute Domain Values:
   Range Domain: Shape_Leng >= 153163.567520 =< 808837.4881440

 Shape_Area
 Attribute Definition: Area of feature in internal units squared.
 Attribute Definition Source: ESRI
 Attribute Domain Values:
 Range Domain: Shape_Area >= 225414016.078 =< 4302714954.09

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Cook County Bureau of Information Technology and Automation
Contact_Person: Alan Hobscheid
Contact_Position: GIS Coordinator, Cook County Department of Office Technology
Contact_Address:
Address_Type: mailing and physical address
Address: 69 W. Washington Street
Address: Room 2700
City: Chicago
State_or_Province: Illinois
Postal_Code: 60602
Country: USA
Contact_Voice_Telephone: 312-603-1399
Contact_Facsimile_Telephone: 312-603-9904
Contact_Electronic_Mail_Address: ahobscheid@cookcountygov.com
Hours_of_Service:
09:00 - 17:00, Central Time Zone, Monday - Friday, except holidays
Contact_Instructions: Please contact during normal business hours.
Resource_Description:
Cook County Board of Commissioner's 2001 1:1200-Scale Cook County Commissioner District Boundaries. Geodatabase Vector Digital Data. Version 2.0 Published: August 2004.
Distribution_Liability:
Cook County is committed to offering its data users accurate, useful and current information. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop the database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data and other conditions specific to certain data. No warranty expressed or implied is made by Cook County regarding the accuracy or utility of this information.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcGIS
Format_Version_Number: 8.3
Format_Specification: ESRI Feature Class
Format_Information_Content:
ArcGIS Version 8.3 feature class (simple feature type) dataset type with polygon geometry.
File_Decompression_Technique: no compression applied
Transfer_Size: < 1 MB
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 750
Recording_Density_Units: Megabytes
Recording_Format: DOS-copy
Compatibility_Information: Accessible on any computer capable of reading a CD-ROM
Turnaround: Order dependent.
Custom_Order_Process:
Call the individual listed as the Contact_Person in the Distribution_Information section of this metadata record to find out how to obtain this data set, the available formats, the available transfer media, compatibility, etc. This person will also be able to provide information about the fees associated with obtaining the data set.
Technical_Prerequisites: Format compatibility is the user's responsibility.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 200408

Metadata_Reference_Information:
Metadata_Date: 20070625
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Person: Mike Hoather
Contact_Position: Subcontractor to the Cook County Board of Commissioners
Contact_Address:
Address_Type: mailing and physical address
Address: 225 W. Huron Street, Suite 518
City: Chicago
State_or_Province: Illinois
Postal_Code: 60610
Country: USA
Contact_Voice_Telephone: 773-251-4678
Contact_Electronic_Mail_Address: mhoather@excite.com
Hours_of_Service:
09:00 - 17:00, Central Time Zone, Monday-Friday, except holidays
Contact_Instructions: Please contact during normal business hours
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: None
Metadata_Use_Constraints:
This metadata file is intended to accompany the geospatial data set identified and received from Cook County. It is not to be altered or summarized. Cook County does not support secondary distribution. If this geospatial data set was received from anyone besides the Cook County Department of Office Technology, this metadata file and the geospatial data set it describes may lack integrity.
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.9.3 on Sun Aug 5 11:13:34 2007