Gründtlicher augenscheinlicher Bericht dess newen geometrischen gruntreissenden Instruments, Planimetra genandt, mit seinem Inductorio und Ramen ...
Levinus Hulsius published this 1604 German treatise, printed at his own expense in the seventeenth century, describing a geometric surveying instrument called the Planimetra for military and practical use. Its diagrams show geometric constructions in simple line work: circles cut by chords, bisected angles, a half-circle with a perpendicular, and a row of dot-patterned numerals. A designer might draw on their clean, schematic logic for diagrammatic layouts, labelled construction views, or minimalist geometric motifs.
