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The Cook County Bureau of Technology’s Geographic Information Systems (GIS) division has announced the release of CookViewer 3.1, an update to its property information platform. This version introduces enhancements in performance, compatibility, and user experience for both desktop and mobile devices.
CookViewer 3.1 features an upgraded mapping engine built on the ArcGIS Maps Software Development Kit for JavaScript, promising faster load times and improved interactivity. The app now incorporates the Calcite Design System 3.0, providing a modern interface.
“As technology evolves, so must our tools,” said Cook County President Toni Preckwinkle. “CookViewer 3.1 reflects our commitment to keeping public data accessible, navigable and useful to everyone in the county.”
A new Help dialog and guided tour have been added for first-time users to better understand the platform's tools. These updates focus on user experience and education.
Parcel symbology has been enhanced for better readability with increased contrast between parcel boundaries and aerial imagery. A redesigned Measure tool and streamlined PDF property reports offer more accurate assessments.
Usability improvements include standardized panel controls, improved mobile layouts, and new visual cues to aid printing and parcel selection processes. Several bugs have been fixed to improve stability in tools like Comparable Search and Select Multiple Parcels. CookViewer is available in English and Spanish.
Since its initial launch in 2010, CookViewer has become a trusted resource for residents, businesses, and government agencies. With Version 3.1, Cook County aims to continue promoting transparency and innovation in geographic information delivery.
To explore the updated application, visit maps.cookcountyil.gov/cookviewer
