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List of top Surveying and Mapping Questions on Two-Dimensional Four-Parameter (Helmert) Similarity Transformation asked in GATE GE

The vector \( [5,\ 3] \) in a right-handed planar coordinate system was transformed to a different coordinate system resulting in the vector \( [6.66,\ 12.20] \) using a four-parameter similarity transformation.

Select the CORRECT set of transformation parameters from the choices given below. The transformation parameters are given in the following order: scale, rotation angle, translation vector.

Hint: For a right-handed system, the rotation matrix \( R(\theta) \) in two dimensions is given as
\[ R(\theta) = \begin{bmatrix} \cos\theta & -\sin\theta \\ \sin\theta & \cos\theta \end{bmatrix}. \]
  • GATE GE - 2026
  • GATE GE
  • Surveying and Mapping
  • Two-Dimensional Four-Parameter (Helmert) Similarity Transformation
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