Environmental Engineering Reference
Fig. 8 Examples of interactive visualization: a correlation matrix that visualizes relationships
between variables (e.g. air temperature and soil salinization). Source Edgar Anderson,
b streamgraph showing a time series of variable development based on relative area change
(e.g. water quality variables: conductivity, pH, etc.). Source Lee Byron and Martin Wattenberg,
c calendar chart showing colour-coded soil moisture at a certain day. Source Rick Wicklin and
Robert Allison, d chord diagram showing relationships between different groups of entities (e.g.
political relationships). Source Martin Krzywinski, and e interactive tool ' Urban Water Explorer '
that illustrates water resources, quality of life index and urban population. Source Jan Willem
Tulp, http://www.visualizing.org/visualizations/urban-water-explorer ; all illustrations created
using D3.js library, images obtained from https://github.com/mbostock/d3/wiki/Gallery
Nowadays, traditional data plotting methods become interactive and web-based,
examples are given in Fig. 8 (e.g. with D3.js open source tool). The interactivity
and visually accessible/catchy design makes them increasingly interesting for
education and decision-makers for understanding the relationships of processes and
temporal dependent changes. Networks, interactive or not, are adequate visualiza-
tion techniques for illustrating any kind of water service relationships (e.g. network
of water suppliers). Useful open source tools to create several types of networks are
D3.js (Fig. 8 ) and Gephi. The
shows how these tools can
be used to inform the public interactively through combination of several visuali-
zation tools and statistics (Fig. 8 e). The
Urban Water Explorer
about the amount of annual renewable water sources, quality of life index and urban
population of each country.
For public education purposes, infographics can be a powerful conceptual
illustration method of complex environmental, socio-economic or political issue.
Infographics combine visual and textual components that make it easier to transport
the desired statement of a speci
Urban Water Explorer
c issue by the editor to the target group through
limiting the space of interpretation.