unit 4

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Across
  1. 3. The principal unit of the rectangular survey system
  2. 7. The primary imaginary line running east and west
  3. 8. A point line or surface from which elevations are measured
  4. 9. A permanent reference mark indicating a fixed elevation
  5. 11. A designated airspace over a piece of land
  6. 12. Lines running east and west parallel to the base line
  7. 14. A row of townships running east and west
  8. 15. A physical object used to establish boundaries
Down
  1. 1. A one-square-mile block of land containing 640 acres
  2. 2. A precise written identification of a property
  3. 4. A description that allows a surveyor to locate land
  4. 5. A specific location used to mark a corner or change in direction
  5. 6. A method of legal description for subdivided land
  6. 10. A strip of land six miles wide running north and south
  7. 13. The process of precisely measuring and mapping boundaries