Daily air quality observation coverage max (2021-03)

The dataset provides the daily evolution of the estimation of the maximum, minimum and average concentrations of each pollulant. This dataset has been created in the context of the TRAFAIR project — https://trafair.eu/本数据集呈现了各类污染物浓度的最大值、最小值及平均值的逐日估算演变情况。本数据集是在TRAFAIR项目框架下创建的，项目官网为https://trafair.eu/