 Reference marks Note 11. — A standard disk reference mark with the arrow pointing toward the station set at the center of the top of (a) a square block or post of concrete, (6) a concrete cylinder, (c) an irregular mass of concrete.  Special Publications - Página 1071935Visualização integral - Acerca deste livro
 | U.S. Coast and Geodetic Survey - 1921 - 232 páginas
...a horizontal position with a drill hole in its upper surface.. 94. Reference marks.— Note 11.—A standard disk reference mark with the arrow pointing...toward the station set at the center of the top of, (o) a square block or post of concrete, (&) a concrete cylinder, (c) an irregular mass of concrete.... | |
 | 1926 - 344 páginas
...surface of the ground (a) a bottle in an upright position, (6) an earthenware jug in an upright ppsition, (c) a brick in a horizontal position with a drill hole in its upper surface. BEFEBENCE MARKS Note 11. — A standard disk reference mark with the arrow pointing toward the station... | |
 | C. F. Maynard, J. A. Bond - 1927 - 538 páginas
...Embedded in earth 3 feet below the surface of the ground, (a) a bottle in an upright position, (b) an earthenware jug in an upright position, (c) a brick...horizontal position with a drill hole in its upper surface, (d) a piece of tile or drainpipe, (e) an earthenware cone, (/) a flowerpot, (g) a stone pot or cone.... | |
 | U.S. Coast and Geodetic Survey, William Norris McFarland - 1927 - 92 páginas
...feet high. It is marked by a standard bronze disk station mark set in an irregular mass of concrete. A standard disk reference mark with the arrow pointing toward the station was set in concrete in a depression in the outcropping bedrock, S. 48° 51' E., 48.07 feet from the... | |
 | U.S. Coast and Geodetic Survey, W. N. McFarland - 1927 - 92 páginas
...feet high. It is marked by a standard bronze disk station mark set in an irregular mass of concrete. A standard disk reference mark with the arrow pointing toward the station was set in concrete In a depression in the outcropping bedrock. S. 48° 51' E., 4S.07 feet from the... | |
 | U.S. Coast and Geodetic Survey, William Norris McFarland, Robert W. Knox - 1928 - 86 páginas
...triangulation station and a Spanish dagger about 148 feet distant, the only one on the island. It is a standard disk reference mark, with the arrow pointing...toward the station, set at the center of the top of a concrete cylinder. The magnetic station bears N. 88° 01'.2 E., 342.4 fet.t from the triangulatiou... | |
 | Russell Charles Brinker, Roy Minnick - 1995 - 1010 páginas
...Embedded in earth about 3 ft below the surface of the ground (a) a bottle in an upright position, (b) an earthenware jug in an upright position, (c) a brick...upper surface. Reference marks Note 11. A standard reference-mark disk, with the arrow pointing toward the station, set at the center of the top of (a)... | |
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