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Regional Transportation Authority
Mapping and Statistics (RTAMS)
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RTAMS Dataset Details

Counties

Dataset:Counties
Source:NIPC
Data Vintage:1990
Update Frequency:As needed
Description:This polygon file contains the boundaries of the Northeastern Illinois Planning Commission's (NIPC) six-county service area: Cook, DuPage, Kane, Lake, McHenry, and Will Counties. The file was created by NIPC staff and derived from NIPC's 1990 1:24,000-Scale Minor Civil Divisions File.

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