Usage scenarios

1. You are interested in all stations of one country
provides all stations from Germany. The country must be specified with its ISO-3166 ALPHA-2 code (DE -> Germany).

2. You are interested in time series data for variables ozone and pm1 of a specific region
will get you the variable id for ozone (5) and pm1 (4).,7,50,8&variable_id=5,4
will get you all the time series within an area between 49°N 7°E and 50°N 8°E that record ozone or pm1.