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Artefact gallery

Calculations

For surveyors and cartographers, arithmetical calculations are necessary for the production of maps and plans. From the earliest times, mathematicians have invented instruments and tables to assist their work.

  • Abacus is the earliest form of calculator
  • Circular slide rule
  • Curta is a type of mechanical calculator used from the 1960s
  • Cylindrical slide rule
  • A cylindrical slide rule with a logarithmic line arranged spirally on the surface of the cylinder
  • An electronic pocket calculator introduced in the 1970s
  • An early type of mechanical calculator
  • A type of mechanical calculator used in the early 1900s
  • A type of mechanical calculator used in the 1920s
  • Planimeter was used to calculate the area of a two-dimensional shape in one plane
  • Slide rule contains markings that allow it to be used for performing mathematical computations
  • Traverse table developed to be used for mathematical calculations
  • Traverse table reader used in conjunction with the Crellin's complete traverse table

In this guide:

  1. Distance measurement instruments
  2. Drafting and mapping instruments
  3. Angular measurement instruments
  4. Heighting instruments
  5. Surveying accessories
  6. Astronomical observing instruments and timekeeping
  7. Artefact gallery
  8. Photographic equipment
  9. Calculations

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Last updated:
13 March 2018
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