工程测量期末考试卷及答案（Final examination paper and answer）.docVIP

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工程测量期末考试卷及答案（Final examination paper and answer）.doc

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工程测量期末考试卷及答案（Final examination paper and answer）

工程测量期末考试卷及答案（Final examination paper and answer） 2011-2012 autumn Fill in the blanks,  will proper words to fill in line. A total of 20  1, the north and south direction measurement using plane rectangular coordinate system based on the longitudinal axis of the X axis  to things in the direction of the horizontal axis for the Y axis. 2. The basic work of measurement is high difference measurement, horizontal Angle measurement and distance measurement. 3  field measurement datum is plumb line  datum is the geoid. Measuring work in the industry of datum line is normal  datum is rotating   reference ellipsoid. 4, at present our country 1985 national height datum to benchmark the origin of the height of 72.260 m   level The standard English symbol BM. 5, ground point to assume that the geoid The vertical distance is called the relative elevation  this point A point on the geoid  the absolute elevation of point A is zero. 6, leveling point was defined as elevation after   known points in turn point is passed elevation point. 7. Telescopic visual axis refers to the connection of the intersection of objective and cross wires. 8. The purpose of the rotating objective for the operation of the instrument is clear. The purpose of rotating eyepiece to light spiral is clear cross. 9  in the process of the theodolite is the place for the purpose is to instrument center and measuring  on the site is located in the same vertical line The purpose of leveling is vertical axis lead vertical, horizontal disk level. 10, A level measurement known point A height of 241.000 m  before reading of 0.938 m  after reading of 1.438 m  Point B of the height of 241.500 m  the line of sight of instrument height is 242.438 m. Over a horizontal Angle of the 11, back to measuring  need to target readings are starting to plate processing  180 ° / n In order to eliminate the error caused by uneven plate drawing. , poor vertical plate index X 12  but belong to instrument error mea