Practice Quiz

Surveying FS

Category - Geodesy & Mapping

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The convergence angle varies with which of the following in a Lambert conformal conic projection for a state plane coordinate system?
  1. Latitude
  2. Longitude
  3. Both latitude and longitude
  4. None of the above
Explanation
Answer: B - The convergence angle varies with longitude when utilizing a Lambert projection for a state plane coordinate system. The Lambert projection superimposes a cone over the sphere of the Earth with two reference parallels secant to and intersecting the globe to minimize distortion. This projection is used to define the state plane coordinate systems in states that are elongated from east to west (such as Oklahoma and Tennessee).
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