16 Control Surveys

16 Control Surveys - Control Surveys CE 111 Definitions...

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Control Surveys CE 111
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Definitions: Line – a mathematical line (invisible) without breadth Corner – the end of a boundary line or the change in direction of a boundary line May also be placed to reference a point
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Definitions: Boundary invisible line that identifies and separates adjoining tracts of land Monuments the physical object that indicates the location of a point, station, or corner (bench marks, control points)
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Plane vs. Geodetic Surveys Plane surveys measurements reflect a horizontal surface (less than 300 sq. miles) Used for surveys of small geographic areas. Geodetic Surveys – measurements reflect the curved (ellipsoidal) shape of the earth Used for surveys of large geographic areas. Used for higher accuracy
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Accurate surveying cannot be done without good monuments (control points) Networks for geodetic horizontal and vertical control points are continually being extended and upgraded
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Typical Geodetic Monuments: (bench marks/control points)
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Not just for surveying…
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Monuments = Control Points = Bench Marks 250,000+ horizontal control points ~ U. S.
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This note was uploaded on 09/20/2011 for the course C E 111 taught by Professor Staff during the Spring '08 term at Iowa State.

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16 Control Surveys - Control Surveys CE 111 Definitions...

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