Traité de l'usage du pantometre : instrument geometrique propre à prendre toutes fortes d'angles, mezurer les distances accessibles & inaccessibles, arpenter & diviser toutes fortes de figure, &c., nouvellement inventé par le Sr. Bullet, architecte & ingenieur du roi & de la ville
Pierre Bullet's 1675 Paris treatise explains his pantometer, a geometric instrument for measuring angles, distances and areas in surveying, written for engineers and architects working for the king. Its pages are mostly engraved diagrams of surveying setups: triangulation lines drawn over plans and landscapes, with figures labelled by letter and fortification profiles. A designer could take from them the clean, schematic line work of early modern technical plates, with lettered points and dotted sight lines that read well as diagram motifs.
