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File:Chicago City Datum.jpg

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Original file (2,304 × 1,414 pixels, file size: 751 KB, MIME type: image/jpeg)

Summary

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

Licensing

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.
w:en:Creative Commons
attribution
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depicts

inception

13 July 2006

coordinates of the point of view

41°52'50.596"N, 87°37'56.986"W

media type

image/jpeg

checksum

0a710b8c57758e070c896f1e48ea7f39d9df68bf

determination method or standard: SHA-1

data size

769,500 byte

height

1,414 pixel

width

2,304 pixel

File history

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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{{Information |Description= Chicago City Datum Plaque |Source= self-made |Date= July 13, 2006 |Author= Cosmo1976 |Permission= |other_versions= }}

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