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Invar (Nickel-Steel) Tapes on the Measurement of Six Primary Base Lanes
Until near the end of the last century, geodesists considered some form of bar apparatus necessary for the accurate measurement of primary base lines. The use of any bar apparatus is very expensive, hence, when it became apparent that frequent bases were required in a triangulation scheme, a more economical form of measuring apparatus was necessary. As the question of economy would undoubtedly be solved by the use of long tapes or wires, many attempts were made to devise some means of securing a satisfactory degree of accuracy with apparatus of this type. Long steel tapes or wires had been in use for many years for measuring purposes, but, until about 1890, they were not considered accurate enough for primary measurement. Although many had investigated the use of tapes for accurate measurement, to a greater or less extent, one of the first to make a successful investigation was Professor R. S. Woodward, while he was an Assistant on the United States Coast and Geodetic Survey.
Invar (Nickel-Steel) Tapes on the Measurement of Six Primary Base Lanes
Until near the end of the last century, geodesists considered some form of bar apparatus necessary for the accurate measurement of primary base lines. The use of any bar apparatus is very expensive, hence, when it became apparent that frequent bases were required in a triangulation scheme, a more economical form of measuring apparatus was necessary. As the question of economy would undoubtedly be solved by the use of long tapes or wires, many attempts were made to devise some means of securing a satisfactory degree of accuracy with apparatus of this type. Long steel tapes or wires had been in use for many years for measuring purposes, but, until about 1890, they were not considered accurate enough for primary measurement. Although many had investigated the use of tapes for accurate measurement, to a greater or less extent, one of the first to make a successful investigation was Professor R. S. Woodward, while he was an Assistant on the United States Coast and Geodetic Survey.
Invar (Nickel-Steel) Tapes on the Measurement of Six Primary Base Lanes
French, Owen B. (author)
Transactions of the American Society of Civil Engineers ; 60 ; 219-242
2021-01-01
241908-01-01 pages
Article (Journal)
Electronic Resource
Unknown
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