File:Chicago City Datum.jpg

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Description
English: Chicago City Datum Plaque.

This bench mark designates the primary datum for the city of Chicago. It is from this point that all heights in the city are measured.

 
"The City Datum is hereby established as a plane 17.640 feet below the bench mark cut on top of the bottom stone of the granite base at the southeast corner of the Northern Trust Company bank building at the northwest corner of South Lasalle Street and West Monroe Street"

September 12, 1928
Municipal Code of Chicago
Date
Source Own work
Author Cosmo1976
Camera location41° 52′ 50.6″ N, 87° 37′ 56.99″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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I, the copyright holder of this work, hereby publish it under the following licenses:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
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This file is licensed under the Creative Commons Attribution 3.0 Unported license.
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Date/TimeThumbnailDimensionsUserComment
current02:45, 18 January 2008Thumbnail for version as of 02:45, 18 January 20082,304 × 1,414 (751 KB)Cosmo1976 (talk | contribs){{Information |Description= Chicago City Datum Plaque |Source= self-made |Date= July 13, 2006 |Author= Cosmo1976 |Permission= |other_versions= }}

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