For versions for generation and updating, see The Topographic Landscape Model TLM.
swissALTI3D
swissALTI3D is an extremely precise digital elevation model which describes the surface of Switzerland without vegetation and development. It is updated in an cycle of 6 years.
Structure
The improvements and updates for 2008 and 2009 are already taken into account in swissALTI3D.
The data is delivered as a grid with an aperture width of 2 m, 5 m or 10 m. swissALTI3D is available in the following file formats:
- Geotiff
- ESRI ASCII Grid
- ESRI File Geodatabase
- ASCII X,Y,Z single space
Coordinate system:
swissALTI3D is available in the following Swiss coordinate systems:
- LV03 LN02
- LV95 LN02
Quality
The information provided corresponds to the accuracies of all three dimensions
Laser points (less than 2000 metres above sea level): ±0.5 m 1σ
DHM25 (more than 2000 metres above sea level): 3 - 8 m average error
Manual updates (individual points, breaklines and areas): 25 cm - 1 m average error
Applications
swissALTI3D can be used for a number of different applications and offers an ideal basis for a wide variety of areas. For example, it can be used:
- as a height basic data set in a geographical information system
- as a basis for 3D visualisations, simulations and visibility analyses
- as a basis for mapping small structures and forest paths
- as a planning tool in the fields of spatial planning, telecommunication, natural hazards and forestry
- as a basis for orthorectification of aerial and satellite images
Contact
Swiss Federal Office of Topography
Geodata Distribution
Seftigenstr. 264
CH-3084 Wabern
Tel. +41 31 963 21 11
Fax +41 31 963 24 59
E-Mail to geodata
Documentation
Almost every publication concerning the swissALTI3D is available only in German and French. Please select your preferred language in the navigation bar, to view the desired document.
