Topographical Map (Dufour Map)
Federal Office of Topography swisstopoAPIHTMLSERVICEWMSWMTS
Datasets
The first official map of Switzerland. First issued between 1844 and 1864, updated up to 1939. 25 sheets. Map format: 70 x 48 cm = 3360 km2. Representation of the terrain: Shaded hachures. Form of reproduction: Copperplate engraving. Printing process: Gravure printing (also planographic printing from 1905). Number of colours: 1 (2 from 1908 and 3 from 1938). Untrue equal-area conic projection. Ellipsoid: Schmidt 1828. Starting altitude: (Repère Pierre du Niton 376.2 metres above sea level).