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Land Surveying History Hub is a place for land surveyors to discuss and share surveying history for education of future generations of surveyors.ย  As a member of this Hub, you can contribute to the Surveying History Timeline and help Build land surveying time capsules. Contribute what your experience and knowledge to the first ever interactive timeline of land surveying history.

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Diopter instrument

Around 120 B.C., Greeks developed the science of geometry and were using it for precise land division. Greeks developed the first piece of surveying equipment (Diopter). In a work entitled Diopter, Hero of Alexandria, describes it as a portable instrument, an application of the cogwheel, screw, and water level, for taking terrestrial and astronomical measurements. Because of some similarities, Hero's diopter is usually recognized as the ancestor of the modern theodolite.

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