Data visualisation on public-sector websites
Data visualisation is the presentation of data and information in graphical form so that the most important indicators can be understood quickly and clearly. This uses charts, graphs, maps, tables, infographics and interactive dashboards. A properly prepared visualisation helps not only to see the numbers, but also to understand their meaning: trends, changes, comparisons and possible exceptions.
In the public sector, data visualisation is especially important because organisations work with a large amount of information every day. Municipalities publish data on budgets, infrastructure, resident services and project implementation. Schools and education organisations can present admissions information, achievement indicators or the range of education programmes more clearly. Museums and libraries can visually show changes in visitor numbers, event calendars, collection growth or the use of digital services.
Why is data visualisation important?
A well-prepared visualisation helps a visitor find the answer to a question more quickly. Instead of presenting numbers only in a long table or PDF document, they can be shown so that the resident sees the main information straight away. This is especially useful when explaining more complex public administration processes, for example budget allocation, public service workloads or territorial differences.
For organisations, visualisations also help them make better decisions. When data are presented clearly, it is easier to notice recurring problems, assess service efficiency and plan further action. Such decisions are especially relevant for local authority administrations, education departments, cultural organisations and other organisations that have to account to the public while managing resources efficiently.
Where is data visualisation used most often?
- On municipality websites visualisations can be used to present budgets, project progress, the results of resident surveys or territorial data. Interactive maps and charts help residents better understand how work is being planned in their district office or city.
- On schools and education organisations websites they can help present admissions stages, class occupancy, informal education provision or summaries of pupil achievement clearly. It is important that such data are presented responsibly, without disclosing excessive personal information.
- On museums’, libraries’ and cultural organisation websites visualisation can be used to show visitor numbers, events, educational activities or the use of digital collections. This helps not only to inform visitors, but also to justify the organisation’s value to founders and partners.
- In internal administration systems visualisations are often used in dashboards for staff. They can be used to monitor enquiry flows, document processing times, service workloads or other performance indicators in real time.
What is important to assess when creating visualisations?
On public-sector websites, a nice appearance alone is not enough — clarity, accuracy and accessibility are essential. The visualisation must be understandable to a person who does not have analytical knowledge. That is why it is important to use clear titles, labelled axes, understandable colours and short explanations of what the visitor is seeing.
Accessibility is no less important. Charts should not rely only on colour differences, because that can make information harder to understand for some users. Alternative text explanations, sufficient contrast, the ability to read the information with screen readers and, where possible, presenting the data in table form should be provided. This is especially relevant for organisations that must ensure digital accessibility for all residents.
When creating visualisations, GDPR requirements must also be taken into account. If the data relate to residents, pupils, visitors or staff, it is important to ensure that personal data or information by which a person could be indirectly identified are not disclosed. In practice, this means that aggregated, anonymised or grouped data are usually published publicly.
Interactivity and trust in information
Interactive visualisations can increase resident engagement, as they allow the user to choose a period, area, indicator group or another relevant segment. However, interactivity must be meaningful, not make the website harder to use. If a visualisation is too complicated, the visitor may quickly lose orientation and no longer find the information they need.
It is also important to ensure data reliability. It is worth indicating the data source, the update date and a short explanation of how the indicators are calculated alongside visualisations. This increases transparency and helps avoid incorrect interpretations, especially when public finances, service results or performance indicators are being discussed.
Data visualisation as a transparency tool
For public-sector organisations, data visualisation is not only a technical solution, but also a communication tool. It helps account to the public more clearly, show performance results and strengthen trust in the organisation. When information is presented in an understandable way, it is easier for residents to engage, provide feedback and make informed decisions.
Data visualisation should therefore be planned as an integral part of a website or digital system. It must fit with the content structure, be adapted for different users and meet accessibility, security and legal requirements. Properly implemented visualisation helps public-sector organisations present information not only in a modern way, but also responsibly.