1.3.1. Interactivity

Cartography benefited a lot from the development and the ideas of multimedia systems and it continuously does. Multimedia cartography derived from the need to intuitively present geographical information on computer screens. In contrast to traditional cartography, a multimedia map combines various media and may feature interactivity.

In the above atlas example, interactivity is provided by:

• switching on and off data layers,
• clicking on icons,
• moving the mouse cursor over an element and getting some information,
• watching a film,
• listening to sound,
• etc.

The implementation of interactivity in a multimedia map is important as it allows the user to actively manipulate the map. Thus, a map may be tailored to various user's needs and requirements.

What Exactly Is Interactivity?

Primarily, Interactivity is a fundamental character of a multimedia application. It comprises the information flow between the user and the machine. Not only can a user manipulate the program flow to a certain extent but also information can be recalled. This recall should occur in a selective, intuitive and associative way. What does this mean? It means that the interactive features of an application have to be obvious so that the user is able to interprete their functions at a glance and without any help. In addition the users should have the possibility to choose which interactions they want to activate. Thus, the user avails information according to his interests.

However, it is important that adequate selection options are provided for interactive elements and that interactivity can be dealt with intuitively. Also, it is significant that users get an immediate feedback of the action they performed.