*2.6. Visualisation*

The results of the composite and main indicators are visualized in an anonymized representation using treemap diagrams. This type of presentation was chosen because the data set depicts a large number of municipalities and water supply utilities, but the number of inhabitants varies greatly. The hierarchical structure of the treemap diagrams makes the proportions of the municipalities and water supply companies under consideration clear. At the same time all results are visible. Rectangles of different sizes are used to display the number of inhabitants of the district or the district-free city or municipalities (Ei) in relation to the inhabitants of the entire data set (Eges) (see Figure 3). Thus, each rectangle corresponds to a municipality, which is always at the same position in the respective diagrams. The color of the rectangles represents the value of the indicator. The evaluation of the data sets is carried out anonymously. In addition, the possibilities of drawing conclusions about individual municipalities are minimized by the following selected representation.

**Figure 3.** Explanation of the visualization of the analysis of the status of emergency preparedness planning through treemap diagrams.
