File:Borden Base Line - Massachusetts map, 1871 ends marked.jpg

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Description Map showing the location of the "Borden Base Line" running north/south between South Deerfield and Hatfield, Massachusetts, USA, here indicated as the "Base Line of the Mass. Trigonometrical Survey". This was the baseline for the first geodetic survey in the United States. This line was surveyed in 1831 to an accuracy of better than 1 part in 5 million by Simeon Borden. Ends are marked with red arrows.
Date
Source "Official Topographic Map of Massachusetts", Philadelphia : Stedman, Brown, & Lyon, 1871. Page 43, Franklin County. This image has been cropped to remove extraneous terrain.
Author H. F. Walling, Ormando Willis Gray.
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(Reusing this file)		 Public domain - author died more than 70 years ago.

This file was derived from: Borden Base Line - Massachusetts map, 1871.jpg

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current04:29, 21 March 2021Thumbnail for version as of 04:29, 21 March 2021642 × 670 (197 KB)Pechristener (talk | contribs)== {{int:filedesc}} == {{Information |Description=Map showing the location of the "Borden Base Line" running north/south between South Deerfield and Hatfield, Massachusetts, USA, here indicated as the "Base Line of the Mass. Trigonometrical Survey". This was the baseline for the first geodetic survey in the United States. This line was surveyed in 1831 to an accuracy of better than 1 part in 5 million by Simeon Borden. Ends are marked with red arrows. |Source="Official Topographic Map of Mass...

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