Map Wonder

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Across
  1. 2. A book of maps.
  2. 5. Line of measure around the earth.
  3. 8. The extremities on the earth's axis.
Down
  1. 1. Map-maker.
  2. 3. Imaginary line parallel to the equator.
  3. 4. Line on a map.
  4. 6. Imaginary global circle.
  5. 7. A navigational instrument.