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Sık kullanılan terimler ve kelime öbekleri
30 feet Allegheny aluminum tablet stamped Back azimuth bridge seat bronze tablet marked bronze tablet stamped cemented a bronze center of top chiseled square Clearfield CLEARFIELD COUNTY coping stone Creek distance east rail feet east feet north feet northeast feet south feet west fence flag station Frank Sutton front of station Geological Survey ground HARRISBURG hill INDIANA COUNTY Latitude Longitude maps marble post marked U. S. Geological Meters mile east miles north miles south miles southwest miles west north of station northwest corner Pennsylvania Railroad bench PITTS PITTSBURG PITTSBURG 1899 post 36 postoffice QUADRANGLE Railroad bench mark railroad bridge Reference marks ridge road crossing sandstone post set 36 inches southeast corner Station mark stone post tablet marked U. S. Theodolite TIOGA COUNTY top of rail top of west topographer township tree true north true south U. S. Geological Survey-Pennsylvania United States Geological west of true west rail WESTMORELAND COUNTY wing wall
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Sayfa 48 - And it is hereby provided that said map shall accurately show the outlines of all townships, counties and extensive wooded areas in this State, as existing on the ground at the time of the execution of these surveys; the location of all roads, railroads, streams, canals, lakes and rivers, and shall show by contour lines the elevation and depression of the surface of the country, also location of coal, oil, natural gas and clay bearing formations.
Sayfa 172 - Sandstone post 42 by 8 by 8 inches, set 40 inches in the ground, in center of top of which is cemented a bronze tablet.
Sayfa 81 - Prenchville; on south side of knob, about 100 feet lower than summit, at upper edge of field, and has an unobstructed view east, south, and west. On land owned by Peter Brown, but near the property line of the widow Krise. Station mark : A marble post 36 by 6 by 6 inches, set 34 inches in the ground, having a bronze triangulation tablet cemented in its top. (Latitude, 41° 08
Sayfa 48 - The preliminary field maps shall be on such a scale as said Director shall select to secure accuracy in the construction of the final map. 5. It is understood and agreed upon that the geological work shall follow the topographic survey as closely as consistent with economy and in accordance with modern scientific methods. The time of beginning this work to be agreed upon between the State Survey Commission of Pennsylvania and the United States Geological Survey.
Sayfa 83 - A sandstone post 36 by 6 by 6 inches, set 32 inches in the ground, in the center of top of which is set a bronze tablet marked "US Geological Survey — Pennsylvania.
Sayfa 184 - ... number at the same time gives an approximate statement of the elevation. It is assumed that engineers and others finding these bench marks so stamped in the field will communicate with the director of the United States Geological Survey in order to obtain the accepted elevation to hundredths or thousandths of a foot.
Sayfa 184 - ... to correct errors and make the line continuously good throughout. The latter or primary levels are determined with the Y level, precautions being taken against only the principal errors and the levels being run mostly in circuits of single lines. The allowable limit of error observed on the precise work already done by the Geological Survey in this State is represented in feet by 0.02 times the square root of D, and that for the primary...
Sayfa 74 - Station mark: A marble post 36 by 6 by 6 inches, set 30 inches in the ground, in the center of top of which is cemented a bionze triangulation tablet. Reference mark: Oak signal tree: azimuth, 17° 09', distant from station mark 7 feet. (Latitude, 40" 57
Sayfa 49 - ... 7. For convenience, the United States Geological Survey shall, during the progress of the field work, pay the salaries of the persons employed therein, while the traveling, subsistence, and field expenses shall be paid for the same time by the State. For office work on the map the salaries shall be divided between the two agreeing parties in such a way as to equalize all expenses, provided...
Sayfa 184 - First, a circular bronze or aluminum tablet 3J inches in diameter and one-fourth inch thick, appropriately lettered, having a 3-inch stem cemented into a drill hole, generally in the vertical walls of public buildings, bridge abutments, or other substantial masonry structures.