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
Identification info
- Alternate title
-
Seismic subsoil classes
- Date (Revision)
- 2024-10-09
- Date (Creation)
- 2008-01-01T00:00:00
- Citation identifier
- ch.bafu.gefahren-baugrundklassen
Citation identifier
- Status
- Under development
Point of contact
Responsible party
- Organisation name
-
Hazard Prevention Division, Federal Office for the Environment
- Voice
-
+41 58 464 10 75
Address
- City
-
Bern
- Postal code
-
3003
- Electronic mail address
-
gefahrenpraevention@bafu.adm gefahrenpraevention@bafu.admin.ch
- Website
- https://www.bafu.admin.ch/bafu/de/home/amt/abteilungen-sektionen/abteilung-gefahrenpraevention.html ( WWW:LINK )
- Role
- Custodian
- Last Name
-
BAFU Gefahrenpraevention
- Organisation Acronym
-
FOEN
- Maintenance and update frequency
- Irregular
Appraisal AAP
- Duration of conservation
- 100
- Appraisal of archival value
- of archival value
- Reason for archiving value
- Evidence of business practice
-
geocat.ch
-
-
microzonation
-
Conservation and archiving planning AAP - Confederation
-
opendata.swiss
-
-
GEMET
-
-
earthquake
-
-
GEMET - INSPIRE themes, version 1.0
-
-
Natural risk zones
-
-
geocat.ch
-
-
FSDI Federal Spatial Data Infrastructure
-
- Use constraints
- Other restrictions
- Other constraints
- Opendata OPEN: Open use.
- Denominator
- 25000
- Language
- Deutsch
- Character set
- 8859 Part 1
- Topic category
-
- F Geology, Soils, Natural Hazards
- F1 Geology
- F3 Natural Hazards
Extent
- Description
-
Switzerland
))

- Distribution format
-
-
ESRI Shapefile (SHP)
()
-
ESRI Personal Geodatabase (MDB)
()
-
ESRI Shapefile (SHP)
()
- OnLine resource
-
Preview map.geo.admin.ch
(
MAP:Preview
)
Preview map.geo.admin.ch
- OnLine resource
-
ch.bafu.gefahren-baugrundklassen
(
OGC:WMTS
)
WMTS-FSDI service, layer "Seismic subsoil classes"
- OnLine resource
-
ch.bafu.gefahren-baugrundklassen
(
OGC:WMS
)
WMS-FSDI service, layer "Seismic subsoil classes"
- OnLine resource
-
STAC Browser
(
WWW:DOWNLOAD-URL
)
Download server from geo.admin.ch
- OnLine resource
-
Link to description
(
WWW:LINK
)
Link to description
- OnLine resource
- Link to information
- OnLine resource
-
BAFU Webseite
(
WWW:DOWNLOAD-URL
)
Link for download
- OnLine resource
-
Link to portal
(
CHTOPO:specialised-geoportal
)
Link to portal
- OnLine resource
-
RESTful API from geo.admin.ch
(
ESRI:REST
)
RESTful API from geo.admin.ch
- OnLine resource
-
Permalink opendata.swiss
(
OPENDATA:SWISS
)
Permalink opendata.swiss
- Hierarchy level
- Dataset
- 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.
- Geometric object type
- Surface
- Reference system identifier
- CH1903+_LV03
Metadata
- Metadata language
- Deutsch
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2024-10-21T09:46:37.826Z
- Metadata standard name
-
GM03 2+
- Metadata standard version
-
1.0
Metadata author
Responsible party
- Organisation name
-
Hazard Prevention Division, Federal Office for the Environment
- Voice
-
+41 58 464 10 75
Address
- City
-
Bern
- Postal code
-
3003
- Electronic mail address
-
gefahrenpraevention@bafu.adm gefahrenpraevention@bafu.admin.ch
- Protocol
-
WWW:LINK
- Role
- Point of contact
- Last Name
-
BAFU Gefahrenpraevention
- Organisation Acronym
-
FOEN