Geological Maps
swisstopo is responsible for the national geological survey and publishes, in addition to the maps of the Geological Atlas of Switzerland in scale of 1:25,000, geological maps on various topics in scale of 1:500,000, as well as special geological maps. The geological maps provide information on the geological composition of the subsurface.
Geological Atlas of Switzerland 1:25,000
The sheets of the Geological Atlas, based on the sheet layout and topographic background of the Swiss National Maps, provide detailed information on the uppermost sedimentary and bedrock layers/units.
![Erläuterungen zu GA25](https://prod-swishop-s3.s3.eu-central-1.amazonaws.com/styles/swt_16_10_750x469/s3/2024-05/Teaser-GA25.jpg?h=602a36b5&itok=kcToumwM)
Explanatory booklet of the GA25
Explanatory booklet of the Geological Atlas of Switzerland 1:25,000. For each sheet, an explanatory booklet is also published, in which the geological formations and special features of the study area are described. Downloadable version in PDF format.
![Geological Special Maps](https://prod-swishop-s3.s3.eu-central-1.amazonaws.com/styles/swt_16_10_750x469/s3/2023-04/Teaser-Geologische-Spezialkarte.jpg?h=602a36b5&itok=Q5024vrY)
Special Geological Maps
Various different geological and tectonic maps at scales from 1:25,000 to 1:100,000 supplement the information given in the Geological Atlas of Switzerland and the Geological Map 1:500 000.
![Geomaps 500000](https://prod-swishop-s3.s3.eu-central-1.amazonaws.com/styles/swt_16_10_750x469/s3/2023-04/Teaser-GeoKarten.jpg?h=602a36b5&itok=m2vD55zJ)
GeoMaps 1:500,000
A range of six small scale geological, tectonic, hydrogeological, geophysical and paleoglaciological maps of Switzerland. These maps give a broad overview of the composition and major features of the underlying structure of our country.
![Gravimetric Maps](https://prod-swishop-s3.s3.eu-central-1.amazonaws.com/styles/swt_16_10_750x469/s3/2023-04/Teaser-Gravimetrischer-Atlas.jpg?h=602a36b5&itok=fooUB5uw)
Gravimetric Atlas of Switzerland 1:100,000
Bouguer anomalies across Switzerland are shown in 22 sheets.
![Hydrogeological Maps](https://prod-swishop-s3.s3.eu-central-1.amazonaws.com/styles/swt_16_10_750x469/s3/2023-04/Teaser-Hydrogeologische-Karte.jpg?h=602a36b5&itok=-Vzy3CRf)
Hydrogeological Map of Switzerland 1:100,000
The Hydrogeological Map 1:100’000 (HYGEO100) provides a regional overview of the occurrence and water flow in the subsurface.
![Hiking Geology](https://prod-swishop-s3.s3.eu-central-1.amazonaws.com/styles/swt_16_10_750x469/s3/2023-04/Teaser-Wanderkarte-mit-Geologie.jpg?h=602a36b5&itok=65EViJNq)
Hiking Maps with Geology
The hiking maps with additional geological information give a unique insight into the geological history of our landscape.