This product includes the most recently updated boundaries for taxing districts and major elected official districts, as well as current precinct boundaries. Some of these boundaries change frequently, such as municipal boundaries, so the data on this compact disc are current as of the time the disc is produced. As a result, these boundaries may not correspond to those used in tax extension for a particular tax year, or in the case of elective offices and voting precincts, may not correspond to the boundaries in effect at the time of a specific election.
Disc contents include boundaries for the following district types: municipal, community college, elementary schools, fire service areas, high schools, the Joint Action Water Agency of Lake County, library districts, mosquito abatement, park districts, sanitary districts and special service areas. Voting precinct boundaries are also included, as are the Forest Preserves and Fox Waterway Agency boundaries and boundaries for Lake County Board districts, Judicial Circuit Court sub-circuits, political townships, Illinois State Representatives, Illinois State Senators and Representatives to the U.S. Congress.
The boundaries are in the form of ESRI shapefiles using the Illinois State Plane Projection, East Zone, and the NAD83 horizontal datum. The units of measurement used in county mapping are feet.
NOTE: CAD users, this is a large, county wide dataset optimized for use with GIS software. CAD software such as AutoCAD or MicroStation may NOT be able to open this dataset. Make sure your software and computer can handle this file size effectively before purchasing.
The District Boundary compact disc may be purchased for $50. The purchase price is not refundable. A defective disc may be exchanged for a replacement disc for the same product at no charge. Purchasers should verify that the software they plan to use with this data is capable of reading Environmental Systems Research Institute (ESRI) shape files before buying the compact disc. No software is provided with the data.