Before lasers and GPS, construction engineers had to use tools like this and a whole lot of math.



  • Fact 1: Instruments like this measure points on the ground and the angles and distances between them for use in engineering and mapping.
  • Fact 2: The earliest known surveying helped lay down the foundations of the earliest recorded construction projects about 5000 years ago.
  • Fact 3: Modern evidence suggests prehistoric surveyors used ropes and wooden pegs to precisely lay out the monoliths of Stonehenge around 2500 BC.
  • Fact 4: Around 300 AD, the Roman Empire hired the first professional surveyors to measure and map imperial lands for accurate taxation.
  • Fact 5: Traditional surveying equipment was imprecise and required complex math. Modern devices incorporate GPS and laser range-finding.

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