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Click on the appropriate module to find out more about each one ...
  • SURVEYORS
    • Traverse
    • Reduce Field Obs
    • Level Book
    • Resection
    • Star Azimuth
    • Least Squares
  • SETTING-OUT ENGINEERS
    • Polar/Rectangular
    • Offsets
    • Intersections
    • Intersection of Gradients
    • Parallel Lines
    • Add Curve
    • Transform Points
    • Fit Spiral
    • DXF Viewer
    • MX Viewer
  • QUANTITY SURVEYORS
    • DTM Volume
    • Area by Coords
    • Trapezoidal Area/Vol
    • Unit Converter

Interpolation

Determining the heights at points along say a pipeline is a simple matter of multiplying the distance by the gradient. Parabolic and Cubic curves follow slightly more complex rules but these are more often used in the construction of highways and railways. A Cubic interpolation is regularly used in changing the crossfall of a road from one side to the other to maintain a smooth flow whilst a parabola best suits the longitudinal axis for a vehicle to follow.

 

Triangles and Curves

Every schoolboy will know how to solve a right angled triangle but sometimes we forget as we get older as my Father acknowledged when he’d tell me to go out and get a job while I still know everything

TRIG.......

 

Anyone involved in construction will at some time have to deal with simple shapes built up of triangles and curves.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  • NRG Main Page
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