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alti3D

Technical details

Structure

The data are delivered as a grid with an aperture width of 0.5 m, 2 m, 5 m or 10 m. The data are delivered by complete 1 km2 tiles. The spatial density of the data is not always high enough to provide the smallest aperture width (0.5 m). In that case, the data are oversampled. swissALTI3D is available in the following file formats:

  • TIF + TFW
  • ESRI ASCII Grid
  • ASCII X,Y,Z single space

Coordinate system

swissALTI3D is available in the following Swiss coordinate systems:

  • LV95 LN02
  • LV03 LN02

Quality

The information provided corresponds to the accuracies (1 sigma) of all three dimensions. The spatial distribution of these different kinds of data is available in the release note (available only in German or French).

New generation of LiDAR data : 0.3 m

Previous generarion of LiDAR data (less than 2,000 metres above sea level): 0.5 m

Stereo correlation  (more than 2,000 metres above sea level): 1 to 3 m

Manual updates (individual points, breaklines and areas): 0.1 m to 1 m

Documents

Almost all publications concerning swissALTI3D  are only available in German and French. Please select your preferred language in the navigation bar to view the desired document.

Sample data

The sample data show their type and format. They are free of charge and may be used for test purposes only. It is not permitted to include them in a product.