Cadastre of obstacle limitation surfaces

Obstacle limitation surfaces are a series of three-dimensional surfaces that delimit the obstacle-free airspace generally required for flight safety. Objects that penetrate these limitation surfaces are referred to as aeronautical obstacles. The aim is to protect the airspace from obstacles so that safe flight operations can be guaranteed. The obstacle limitation surfaces cadastre (OLS) is an official determination of the obstacle limitation surfaces for an airfield, an air traffic control facility or a flight path. The Federal Office of Civil Aviation (FOCA) maintains this cadastre for civil installations. This maps all types of three-dimensional obstacle limitation surfaces in accordance with ICAO Annex 14 in a structured and unambiguous manner. The layer only contains data that is approved and conforms to the model.

Data and Resources

Additional Info

Field Value
Identifier 87c13b99-b1a0-4822-a923-42f63067d48d@bundesamt-fur-zivilluftfahrt-bazl
Title for URL of the dataset hindernisbegrenzungsflachen-kataster
Schedule the publication of the dataset -
Issued date March 13, 2024
Modification date November 5, 2025
Conforms to -
Update interval Irregular
Temporal coverage -
Publisher Information Federal Office of Civil Aviation
Contact points ols@bazl.admin.ch
Languages Language independent
URL https://www.bazl.admin.ch/de/sizo-hbk
Relation
Spatial Schweiz
Related datasets -
Documentation
Keywords
Terms of use https://opendata.swiss/terms-of-use#terms_by
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