- Initally, 1323 available time series were fetched with the element
mean(air_temperature) P1Y
(see api). The scope was limited to 1272 time series from the SensorSystem dataset. These time series came from 966 unique sourceIds. - We then successfully fetched observations from 849 sources (i.e. weather stations).
- The meta data (coordinates, etc.) from 311 stations could successfully be requested.
- We then filtered the remaining 311 time series to a dataset containing 54 stations with the following criteria:
- only include data from stations that have recorded data up to 2018 (311 - 89 = 222 stations)
- only include data from stations that have at least 20 years of recordings (222 - 123 = 99 stations)
- exclude data from stations that have a time gap in the recordings that is bigger than 3 years (99 - 45 = 54 stations)