 | William David Pence, Milo Smith Ketchum - Surveying - 1901 - 272 pages
...tangent or secant line, the direction of the line being frequently checked by an observation of Polaris. Principal Meridian. — The principal meridian is...the base line. They are surveyed like the base line. Gnide Meridians. — Guide meridians are extended north *The angular convergency, a, of two meridians... | |
 | United States. Bureau of Land Management - Surveying - 1902 - 438 pages
...Commissioner. STANDARD PARALLELS. 125. Standard parallels, which are also called correction lines, shall be extended east and west from the principal meridian,...intervals of 24 miles north and south of the base line, in the manner prescribed for running said line, and all requirements under the title "Base Line" will... | |
 | William David Pence, Milo Smith Ketchum - Surveying - 1904 - 278 pages
...tangent or secant line, the direction of the line being frequently checked by an observation of Polaris. Principal Meridian. — The principal meridian is...Meridians. — Guide meridians are extended north *The angular convergency, a, of two meridians is m sin L, where m is the angular difference of longitude... | |
 | William David Pence, Milo Smith Ketchum - Surveying - 1904 - 284 pages
...initial point on a true meridian. The same precautions are observed as in the measurement of the basa line. Standard Parallels. — Standard parallels,...Meridians. — Guide meridians are extended north *The angular convergency, a, of two meridians is m sin L, where m is the angular difference of longitude... | |
 | Charles Blaney Breed, George Leonard Hosmer - Surveying - 1906 - 564 pages
...158. "Standard Parallels. — Standard parallels, which are also called correction lines, shall be extended east and west from the principal meridian,...intervals of 24 miles north and south of the base line, in the manner prescribed for running said line, and all requirements under the title ' Base Line '... | |
 | Charles Blaney Breed, George Leonard Hosmer - Surveying - 1906 - 566 pages
...158. "Standard Parallels. — Standard parallels, which are also called correction lines, shall be extended east and west from the principal meridian,...intervals of 24 miles north and south of the base line, in the manner prescribed for running said line, and all requirements under the title ' Base Line '... | |
 | Astronomy - 1907 - 710 pages
...line. 14. Standard Parallels. — These were formerly called correction lines. The standard parallels are extended east and west from the principal meridian,...intervals of 24 miles north and south of the base line, in the manner prescribed for running said base line. In the earlier surveys, standard parallels as... | |
 | William David Pence - 1915 - 416 pages
...same precautions are observed as in the measurement of the base line. Standard Parallels.—Standard parallels, which are also called correction lines,...the base line. They are surveyed like the base line. manner prescribed for running the principal meridian. When existing conditions require that guide meridians... | |
 | James Kip Finch - Surveying - 1918 - 288 pages
...transit on Polaris at elongation. Standard Parallels. Standard parallels, or correction lines, are run east and west from the principal meridian at intervals of 24 miles north and 24 .miles south of the base line, and the law provides that "where standard parallels have been placed... | |
 | United States. General Land Office - Public lands - 1919 - 430 pages
...be fully stated in the field notes. 144. Standard parallels, which are also called correction Una, are extended east and west from the principal meridian,...intervals of 24 miles north and south of the base line, in the manner prescribed for the survey of the base line. Fig.l6. Illustrating the survey of quadrangles... | |
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Standard Parallels. — Standard parallels, which are also called correction lines, are extended east and west from the principal meridian, at intervals of 24 miles north and south of the base line. They are surveyed like the base line. 
