File:Pages from 1893 USGS TRiangulation report for Wiki.pdf

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Summary

Description
English: The triangulation of the U. S. Geological Survey is executed solely

for the primary control of topographic work upon scales not exceeding 1:62500. The extreme of accuracy has therefore not been sought, but only such a degree of accuracy as to ensure that the maximum accumulated error be imperceptible upon the maps.

John Lounsbury Fish worked on this USGS project in the 1891 timeframe and on the highlighted points.
Date
Source https://pubs.usgs.gov/bul/0122/report.pdf
Author United States Geologic Survey

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Public domain
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.

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1 January 1894Gregorian

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