The theodolite was first invented by Leonard Digges around the 16th century in England, who created an early version of the instrument to measure horizontal angles, as described in his 1556 book, Tectonicon. It's important to note that the device's evolution involved contributions from many individuals, with some sources also crediting other early figures like Gemma Frisius or Joshua Habermel for developing similar or improved versions, says this article from the Journal of Young Scientist and this Wikipedia article.
Theodolite, a surveying instrument was first invented by?
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