Essai de la fortification de campagne
Essai de la fortification de campagne is an 1779 French military treatise by Friedrich Wilhelm Ernst von Gaudi, published by the widow Hofer for army engineers and officers studying field fortifications. Its plates show engraved plans of earthwork forts, star-shaped redoubts and sectional diagrams of timber and earth defences, drawn in fine hatched linework with lettered keys. A designer could draw on the clean geometric hatching, the stepped rampart profiles and the labelled plan-and-section layouts as an austere model of diagrammatic schematic drawing.
