Technology

In the field of topography, too, tools have fundamentally changed since 1845. Nonetheless, numerous steps are still required today for the production of maps. Firstly, Switzerland is photographed from an aircraft using an aerial camera. The images are then geo-referenced on the basis of the official survey and subsequently evaluated. The resulting data are recorded and saved in the topographic landscape model, and cartographers prepare the national maps on the basis of these extremely precise data.

Copperplate printing, 1845 to 1949

Cartographer engraving on copper plate
Copperplate engraving

This method was applied for the Dufour, and later the Siegfried, map, and to some extent for the Swiss national map too. The method involved engraving the map as a reversed image on copper plates with the aid of special tools. The prepared plates were then used for copperplate printing.

Lithography, 1870 to 1949

Cartographer working on a lithography stone
Lithography

Lithography was one of the most widely used methods of producing maps in the 19th century. The sheets for the mountain regions on the 1:50,000 Siegfried map were prepared on lithography stones in the form of reverse images. One of the main challenges here was the weight of the stones.

Negative scribing, 1952 to 1999

Cartographer using a special tool for glass engraving
Glass engraving

In 1952, negative scribing replaced copper engraving as the method for producing originals. This method was regarded as state-of-the-art and was developed internally by the Federal Office of Topography. A scribe sheet with a thickness of three-thousandths of a millimetre was placed over a glass plate. Cartographers then engraved the map image in negative form but non-reversed, with the aid of special tools.

CAD technology, 1999 to 2013

Cartographer working on a PC
CAD workdesk

From 1999, the original glass plates for the national maps were scanned in and subsequently fully processed by cartographers using computer-aided design (CAD) software. Any modifications were incorporated into the existing raster data and formed the basis for the printed map and pixel version.

Cartographer working on a PC
GIS workdesk

GIS cartography, 2012 to the present

The reconstruction of the set of national maps in vectorial form in a geographic information system using a special database was introduced in 2012 for the 1:1,000,000 national map. Then in 2013 the partially automated production of the new 1:25,000 national map was initiated on the basis of the topographic landscape model. Here, relief shading and rock depiction were adopted from the previous national map, while the depiction of boulder formations and contour lines was re-created. 


Federal Office of Topography swisstopo Seftigenstrasse 264
P.O. Box
3084 Wabern
Tel.
+41 58 469 01 11

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Cartography
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Print contact

Federal Office of Topography swisstopo

Seftigenstrasse 264
P.O. Box
3084 Wabern

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