geocat.ch
Map of seismic subsoil categories according to the standard SIA 261
The site class is a required indication to determine the seismic action for a structure according to the building code SIA 261. The maps of site classes are indicative maps and are not parcel-specific. In case of uncertainties, the site class is mapped on the safe side. The maps are primarily useful in the context of preliminary studies. When planning construction projects, the plausibility of the site class must be verified on the basis of local studies. In case of differences, the site class based on local investigations should be used.
The maps of seismic site classes are prepared and updated by the cantons on their own initiative based on the methodological guidelines of the FOEN. In agreement with the cantons FOEN makes these maps available centrally. Any requests for corrections or comments must be addressed to the respective cantons, except for the city of Bern and the St-Galler Rheintal (FOEN pilot maps).
* Most maps are based on the description of the site classes of the SIA 261 building code, 2003 edition. This description was adapted in 2014. Differences in the description of the site classes between the currently valid building code SIA 261:2020 and the 2003 edition must therefore be taken into account. The reference building code (SIA261:2003 or SIA 261:2020) for mapping is given in the object information.
Simple
- Alternate title
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Seismic subsoil classes
- Date (Revision)
- 2026-03-04
- Date (Creation)
- 2008-01-01T00:00:00
- Identifier
- ch.bafu.gefahren-baugrundklassen
- Status
- Under development
Custodian
Spatial resolution
Equivalent scale
- Denominator
- 25000
- Topic category
-
- F Geoscientific information
Extent
Extent
- Description
-
Switzerland
))
- Maintenance and update frequency
- Irregular
- Duration of Conservation
- 100
- Appraisal of Archival Value
- A
- Reason for Archiving Value
- Evidence of business practice
- geocat.ch
-
-
microzonation
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Conservation and archiving planning AAP - Confederation
-
opendata.swiss
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- GEMET
-
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earthquake
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- GEMET - INSPIRE themes, version 1.0
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Natural risk zones
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- geocat.ch
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FSDI Federal Spatial Data Infrastructure
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Resource constraints
- Use constraints
- Other restrictions
- Other constraints
- Opendata OPEN: Open use.
- Language
- Deutsch
- Character encoding
- 8859 Part 1
- Subtopic Category
- F1 Geology
- Subtopic Category
- F3 Natural Hazards
- Distribution format
-
-
ESRI Shapefile (SHP)
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ESRI File Geodatabase FileGDB (GDB)
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Digital transfer options
- OnLine resource
-
Vorschau map.geo.admin.ch
Preview map.geo.admin.ch
Digital transfer options
- OnLine resource
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ch.bafu.gefahren-baugrundklassen
WMTS-FSDI service, layer "Seismic subsoil classes"
Digital transfer options
- OnLine resource
-
ch.bafu.gefahren-baugrundklassen
WMS-FSDI service, layer "Seismic subsoil classes"
Digital transfer options
- OnLine resource
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STAC Browser
Download server from geo.admin.ch
Digital transfer options
- OnLine resource
-
Erdbeben: Karten der Baugrundklassen
Link to description
Digital transfer options
- OnLine resource
-
Link zur Fachinformation
Digital transfer options
- OnLine resource
-
BAFU Webseite
Link for download
Digital transfer options
Digital transfer options
- OnLine resource
-
RESTful API von geo.admin.ch
RESTful API from geo.admin.ch
- Statement
-
Die Karten der seismischen Baugrundklassen nach Norm SIA 261 werden meistens von Kantonen auf Eigeninitiative basierend auf dem methodischen Leitfaden des BAFU erstellt und aktualisiert. Sie sind als Hinweiskarten zu betrachten.
- Hierarchy level
- Dataset
- Geometric object type
- Surface
- Reference system identifier
- CH1903+_LV03
Metadata
- Metadata identifier
- 812485e6-821c-412d-8504-459c6b314d1c
- Language
- Deutsch
- Character encoding
- UTF8
- Language
- Français
- Character encoding
- UTF8
- Language
- Italiano
- Character encoding
- UTF8
- Language
- English
- Character encoding
- UTF8
- Language
- Rumantsch
- Character encoding
- UTF8
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://www.geocat.ch/geonetwork/srv/api/records/812485e6-821c-412d-8504-459c6b314d1c
- Date info (Creation)
- 2011-08-24T13:46:16Z
- Date info (Revision)
- 2026-04-13T09:16:53.724673Z
Metadata standard
- Title
-
eCH-0271
