These publicly accessible documents depict property boundaries, parcel numbers, and dimensions within Cook County. Each parcel is assigned a unique Property Index Number (PIN), which serves as a key identifier for tax assessment and property record-keeping. For example, one can use these instruments to identify the precise location and size of a residential lot in a suburb like Evanston or a commercial property downtown.
The significance of these cartographic resources lies in their role in ensuring fair and accurate property taxation. They provide a visual representation of property ownership and enable the county assessor to determine the value of each parcel. Historically, these were meticulously crafted physical maps; however, modern iterations are typically digital and updated frequently to reflect property subdivisions, consolidations, and other changes. Access to this data facilitates transparency and accountability in the property tax system, assisting both property owners and government officials.
