This geodatabase serves two purposes: 1) to provide State of Illinois agencies with a fast resource for the preparation of maps and figures that require the use of shape or line files from federal agencies, the State of Illinois, or the City of Chicago, and 2) as a start for social scientists interested in exploring how geographic information systems (whether this is data visualization or geographically weighted regression) can bring new meaning to the interpretation of their data. All layer files included are relevant to the State of Illinois. Sources for this geodatabase include the U.S. Census Bureau, U.S. Geological Survey, City of Chicago, Chicago Public Schools, Chicago Transit Authority, Regional Transportation Authority, and Bureau of Transportation Statistics.

This layer is a component of Illinois Reference Layers.

© Illinois State Geological Survey

Download In State Plane Projection Here. These address points were developed for a myriad of uses including general public geocoding in Lake County web sites and NG-911 emergency dispatch. All addresses are reviewed on a monthly basis against the United States Post Office delivery database to ensure that they are still active. New addresses are added at this time or earlier if they are made known to Lake County GIS by local data partners. Attributes DiscrpAgID through Elev reflect the NENA NG-911 / State of Illinois GIS Data model. Additional local data fields have also been included. The fields LSt_PreDir, LSt_Name, LSt_Type and LSt_PosDir are formatted according to United States Postal Service standards.Update Frequency:This dataset is updated on a weekly basis.

Download In State Plane Projection Here. Boundaries for electing senators to the Illinois Senate as established by that body. Update Frequency: This dataset is updated on a weekly basis.

This resource is a member of a series. The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. School Districts are single-purpose administrative units within which local officials provide public educational services for the area's residents. The Census Bureau obtains the boundaries, names, local education agency codes, grade ranges, and school district levels for school districts from State officials for the primary purpose of providing the U.S. Department of Education with estimates of the number of children in poverty within each school district. This information serves as the basis for the Department of Education to determine the annual allocation of Title I funding to States and school districts. TIGER/Line Shapefiles include separate shapefiles for elementary, secondary and unified school districts. The school district boundaries are those in effect for the 2022-2023 school year, i.e., in operation as of January 1, 2023.

Download In State Plane Projection Here ** In addition to the Tax Parcel polygons feature class, the hyperlink download above also contains a parcel point data layer ** Parcel boundaries are developed from deeds, plats of subdivision and other legal documents going back to the mid 1800's, following generally accepted practices used in Public Land Survey System states, and following guidelines established by the Illinois Department of Revenue and the International Association of Assessment Officials. Lake County's parcel coverage is based on resolving the accumulated evidence of all of the legal documents surrounding a particular parcel or subdivision, and not the result of a countywide resurvey. These parcel boundaries are intended to be a visual inventory of property for tax and other administrative purposes; they are not intended to be used in place of an on-site survey or for the precise determination of property corners or PLSS features based on GIS coordinates. In Illinois, only a registered professional land surveyor is authorized to determine boundary locations. Included are the tax parcel boundaries, represented as polygons and centroids, for all changes resulting from legal records submitted to the Recorder of Deeds up to December 31st of the preceding year, as well as any court orders, municipal annexations and other transactions which impact the tax parcel boundaries. NOTE: The ONLY attribute included is the Property Index Number, or PARCEL_NUM. Additional assessment attribute data can be downloaded here This parcel layer is used for tax assessment purposes and for a variety of other local government functions. It changes often, both spatially and in its attribution, based on divisions or consolidations, the sale of property and other transactions. Example: PIN 08-17-304-014 can be interpreted as follows: Township 08, Section 17, Block 304, Parcel 014. Note that the first digit of block, "3" in this example, signifies that the parcel lies in quarter section 3. The quarter sections are labeled from 1 through 4, representing the northwest, northeast, southwest and southeast quarter sections, respectively. Update Frequency: This dataset is updated on a weekly basis.

IL Political Townships. This data source is updated by the Illinois Department of Revenue.

This layer is a component of Lake County, Illinois Political Boundary data layers.

© Lake County, Illinois GIS/Mapping Division

Geospatial data about Illinois County Boundaries. Export to CAD, GIS, PDF, CSV and access via API.

This real estate dataset details parcel information for DuPage County, Illinois. The dataset was created and is maintained by the DuPage County Information Technology Department, GIS Division in conjunction with the DuPage County Clerk for the visual and spatial representation of deeds, road rights-of-way, and subdivision plats. The data are complete up to and including Assessment Year 2016. -- "Assessment Year" refers to a complete inventory list of all parcels including billing address and taxing body jurisdictional boundaries by January 1st of the assessment year. In DuPage County, this is information is maintained in a County provided assessment administration computer system. The feature class contains the Assessment Parcels Current as well as the current Real Estate File Current which is joined to the parcels on a weekly basis (see feature class name for the date of creation).

Trails within the Forest Preserve District of Cook County. To view or use these shapefiles, compression software and special GIS software, such as ESRI ArcGIS, is required.

This layer is a component of Lake County, Illinois Political Boundary data layers.

© Lake County, Illinois GIS/Mapping Division

State of Illinois Obesity Percentages by County. Explanation of field attributes: Obesity - The percent of each Illinois county’s population that is considered obese from the 2015 CDC BRFSS Survey.

Geospatial data about Illinois PLSS Townships. Export to CAD, GIS, PDF, CSV and access via API.

Geospatial data about Illinois DOT Districts. Export to CAD, GIS, PDF, CSV and access via API.

Illinois Protected Lands (Prairie State Conservation Coalition). This dataset is a proxy to the I-View dataset maintained by David Holman (Prairie State Conservation Coalition), and can also be accessed on I-View (see link below). Source:https://pscc.maps.arcgis.com/apps/webappviewer/index.html?id=fb8dbaacc7b04c7fa12e850b9e7141ab

Geospatial data about Will County, Illinois State Roadways. Export to CAD, GIS, PDF, CSV and access via API.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Primary roads are generally divided, limited-access highways within the interstate highway system or under State management, and are distinguished by the presence of interchanges. These highways are accessible by ramps and may include some toll highways. The MAF/TIGER Feature Classification Code (MTFCC) is S1100 for primary roads. Secondary roads are main arteries, usually in the U.S. Highway, State Highway, and/or County Highway system. These roads have one or more lanes of traffic in each direction, may or may not bedivided, and usually have at-grade intersections with many other roads and driveways. They usually have both a local name and a route number. The MAF/TIGER Feature Classification Code (MTFCC) is S1200 for secondary roads.

Created for all users to view and understand jurisdictional boundaries within Cook County. GIS department maintains Municipality feature. State of Illinois maintains Board of Review, Congressional District, Judicial District, State Representative and State Senate. Service published in 2019. Data is updated as provided.

Geospatial data about Illinois Counties. Export to CAD, GIS, PDF, CSV and access via API.