SWITZERLAND · LANDSCAPE · NATURAL HAZARDS
Gefahrenkarten — synoptische Gefahrenstufen
What this layer shows
The cantons' hazard maps in synoptic form: for each area, the highest hazard level across flooding, landslide, rockfall and avalanche: high, medium and low hazard and residual hazard. The cantons produce the maps under forestry and flood-protection law and take them into account in structure and land-use planning; in high-hazard areas new buildings are as a rule excluded, in medium-hazard areas possible only with conditions. Hazard maps mostly cover settled areas. Included: the cantons of AG, AI, AR, BE, BL, FR, GE, GL, GR, JU, LU, SH, SO, SZ, TG, TI, VS, ZG and ZH; cantons whose terms of use do not allow use in this app, or that do not publish the data openly, are not included. For the canton of Graubünden's data: “No warranty is given as to the correctness, accuracy, currency or completeness of the published information.”
Publisher and licence
Kantone AG/AI/AR/BE/BL/FR/GE/GL/GR/JU/LU/SH/SO/SZ/TG/TI/VS/ZG/ZH über geodienste.ch (Quelle: Gefahrenkarten, Kanton Graubünden, 2026), Nutzungsbedingungen der Kantone
Licence not stated by the publisher
Kantone AG/AI/AR/BE/BL/FR/GE/GL/GR/JU/LU/SH/SO/SZ/TG/TI/VS/ZG/ZH über geodienste.ch (Quelle: Gefahrenkarten, Kanton Graubünden, 2026), Nutzungsbedingungen der Kantone
Where the data comes from
WFS · geodienste.ch
Merestone asks this service live for the area on screen. Nothing is copied or stored beyond a short cache.
Facts shown for each feature
Highest hazard level · Wasser · Landslide · Rockfall · Avalanche · Assessment · Canton
In these presets
Environmental assessment
Where an environmental consultancy starts a site assessment: the federal biotope inventories, forest reserves and wildlife rest zones, the state of the rivers, wildlife corridors and amphibian crossing sites, the sites of threatened mosses, and the groundwater protection zones, hazard map and polluted-site registers of the cantons that publish them openly.
Water and natural hazards
Groundwater protection zones S1 to S3, Sh and Sm, protection areas, water protection areas Au and Ao and inflow areas, river space, then the hazard and hazard indication maps, the natural event register and seismic subsoil classes: with bathing waters and the ecomorphological state of the rivers.