 Completed in 1667, 
the map showed the territory in shaded relief in hitherto unseen quality and detail, but because the map was classified as a military secret by the Zürich authorities, Gyger's work had limited influence on contemporary cartographers.Gyger also published a detailed map of Switzerland in 1657.In 1809, still under the Napoleonic Act of Mediation, the first topographical surveys of Switzerland took place on a confederate, military level.