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Module:Location map/data/United States Chicago metropolitan area is a location map definition used to overlay markers and labels on an equirectangular projection map of Chicago metropolitan area. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
The Chicago metropolitan area represents about 3 percent of the entire US population. Chicagoland has one of the world's largest and most diversified economies. With more than six million full and part-time employees, the Chicago metropolitan area is a key factor of the Illinois economy, as the state has an annual GDP of over $1 trillion. [7]
Chicago's present natural geography is a result of the large glaciers of the Ice Age, namely the Wisconsinan Glaciation that carved out the modern basin of Lake Michigan (which formed from the glacier's meltwater). The city of Chicago itself sits on the Chicago Plain, a flat plain that was once the bottom of ancestral Lake Chicago. This plain ...
They have contributed to Chicago's reputation as the "city of neighborhoods", and are argued to break up an intimidating city into more manageable pieces. [2] Chicago was an early adopter of such a system, and as of 1997 most cities in the United States still lacked analogous divisions. [2]
The present system dates to 1974, when the Illinois General Assembly established the Regional Transportation Authority (RTA) to consolidate transit operations in the Chicago area, including commuter rail as a public utility. The RTA's creation was a result of the anticipated withdrawal of commuter service operated and owned by various private ...
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As the city grew and annexed adjacent towns, problems arose with duplicate street names and a confusing numbering system based on the Chicago River. On June 22, 1908, the city council adopted a system proposed by Edward P. Brennan; [2] amended June 21, 1909. The changes were effective September 1, 1909 for most of the city. [3]