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Size: Strumento per rilievi topografici, con treppiede, diottra e bussola.
Description: The plane table named after the German mathematician and astronomer Johann Richter, said Praetorius. A goniografo used for measurements in medium and small scales. It consists of a wooden board called mirror combined with a base supported by a tripod. Based on a diopter is given, for guidance is used compass Alidada.
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