LEVELLING AND ITS APPLICATION

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Across
  1. 4. principle in adjustment of dumpy level
  2. 5. deals with measurements in vertical plane
  3. 8. difference between upper and lower stadia reading
  4. 9. modified form of stadia levelling
Down
  1. 1. a point on which both minus sight and plus sight are taken
  2. 2. a relatively fixed point of known elevation above the datum
  3. 3. line of sight is also called as line of
  4. 6. process of determining contours of an area
  5. 7. surveying lens nearest to the object