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There are four general fees: maps, reports, cadastral data, and tabular data.
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Some assessment data can be downloaded through the mapping by clicking the "save" button on the parcels identify results screen. Contact the GIS department for fees for obtaining geographic and/or tabular ownership data.
Transverse Mercator projection, North American Datum 1983, State Plane Illinois West.
The shapefile is a widely used file format for exchanging GIS data between GIS and CAD systems. One shapefile consists of several individual files pertaining to one feature class, like parcel polygon.