Air Quality (Visualisation)
The Cyanometer displays the air pollution level on a color scale and points out the main pollutant in case of pollution. The pollution index is calculated from the concentration values of individual pollutants (PM10 particles, O3, NO2, SO2), which are refreshed every hour. The air pollution level is determined by the pollutant with the highest calculated index.
On the basis of this value, the state of air pollution is divided into four categories: low (green), moderate (yellow), high (orange), very high (red). If the air pollution level is high or very high in a particular time period, the Cyanometer displays the icon connected to the pollutant with the highest index. In the case of ozone, the icon indicates a connection to solar radiation, while in the case of other pollutants icons raise awareness of the emissions that cause the increased levels of the most problematic pollutant.
The proposed index of air quality is based on CAQI (Common Air Quality Index). Cyanometer's index consists of four levels, while CAQI determines five concentration levels. This results in a minor adaptation of concentration levels of each pollutant.