Federal Office for the Environment FOEN

Groundwater temperature

The map provides an overview of Switzerland's current groundwater temperatures. The calculation is based on percentiles of the dataset for the standard period 1991–2020 or, in the case of a shorter data series, the standard period 2001–2020 (basic data in °C). A figure significantly lower than the average conditions (low groundwater temperature) is reached if the current value is below the long-term 10th percentile, i.e. it is among the lowest 10% of all the data measured for the relevant month in the standard period. A groundwater temperature between the 10th and 90th percentiles means that conditions are normal. However, a figure significantly higher than the long-term average conditions (high groundwater temperature) is reached if the current value is above the 90th percentile.

Federal Office of Civil Aviation FOCA

SORA - Map for intrinsic ground risk

European unmanned aircraft regulation (EU) 2019/947 Article 11 requires a SORA (Specific Operational Risk Assessment) to be performed for flights which fit into the Specific category of UAS. One part of this risk assessment is to assess the risk to overflown uninvolved people and this map is tailored for the use in this risk assessment methodology. The map is an estimate of the average distribution of population density based on the Global Human Settlement Layer (GHSL) dataset by European Commission, Inhabitants (STATPOP) and Employment (STATENT) statistics from the Federal Statistical Office (FSO). For cross-border harmonization the European data is used as a baseline which is supplemented with FSO statistics where there are gaps of missing data. Therefor this includes also estimates for areas used for commercial and industrial purposes. The extent of the map is anywhere the Federal Office of Civil Aviation has authority to grant UAS authorizations which is within Switzerland and Liechtenstein. Further, the data extends 5 km beyond the Swiss border into the surrounding countries to allow a proper fly-away risk assesment of flights very close to the borders.

Updates

New data 06.09.2023