Land surveyors' equipment

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Across
  1. 1. pin A metal pin that you are pushing into the ground.
  2. 2. meter A laser device that determines quickly the distance.
  3. 6. You set up a tripod over it.
  4. 8. A kind of theodolite that determines electronically or electrooptically the distance to a given target.
  5. 9. A tool that is used to determine the level.
  6. 10. rod A pole used to sight.
Down
  1. 1. Measures vertical and horizontal angles.
  2. 3. Determines verticality.
  3. 4. Three-legged support is called...
  4. 5. A line between two points.
  5. 7. You need this to dig a hole.
  6. 9. Light amplification by stimulated emission of radiation.