Description: This is data supplied through HERE technologies. It is the Road Data consisting of everything that a road is comprised of in the state of Illinois.
Description: The IRISCODES layer is used to support the various parts of the Department that are involved with sales taxes. The IRISCODES layer defines the boundaries related to collection of sales taxes. These include municipal, township, county, Metropolitan Pier Exposition Authority (MPEA) and Metro-East Mass Transit (MED) districts. Each year an updated layer of property tax districts is produced. The IRIS codes are updated as a follow-on product