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1.8. Glossary

Adaptive Zooming:
A zooming is called adaptive when the representation of a screen map is adapted to the zoom level. Therefore for each zoom level, the quality of the map is always high and the cartographic principles are conformed. Hence, adaptive zooming describes the adjustment of a map, its contents and the symbolization to target scale in consequence of a zooming operation (=scale change). (Brühlmeier 2000)
File-Browser:
A file browser is a computer program that provides a user interface to work with file systems. They are very useful for speeding up interaction with files. The most common operations on files are create, open, edit, view, print, play, rename, move, copy, delete, attributes, properties, search/find, and permissions (Wikipedia).
Fuzzy Navigation:
Fuzzy navigation is when one wants to explore an application without any specific target.
GPS:
"Global Positioning System, based on data transmitted from a constellation of 24 satellites. At least 4 sattelites have to be in range for correct positioning by measuring the signal runtime from the sattelites to the device." (Neun 2006)
GUI (Graphical User Interface):
"The use of pictures rather than just words to represent the input and output of a program. A program with a GUI runs under some windowing system (e.g. The X Window System, Microsoft Windows, Acorn RISC OS, NEXTSTEP). The program displays certain icons, buttons, dialogue boxes etc. in its windows on the screen and the user controls it mainly by moving a pointer on the screen (typically controlled by a mouse) and selecting certain objects by pressing buttons on the mouse while the pointer is pointing at them." (Linuxjunkies)
Hypertext:
Hypertext is text which is extended by links. These links act as pointers to other pieces of text that are located elsewhere, either in the same document or in another document or both. Using these links enables users to "browse around" in one or more documents.
Interval Scale:
"A data scale that preserves the units used but does not have a natural zero point. Interval scales often result from the difference between two values using the same scale." (Bertoline et al. 2002)
Log:
"A log is a device used in navigation to measure the speed of a ship." (Wikipedia)
Multimedia Navigation:
Navigation can be described as the task of determining position within the information space and finding the course to the envisaged information and other relevant related information. Navigation helps to explore information spaces that are too large to be conveniently displayed in a single window. The information space consists of spatial, temporal and thematic dimensions. Therefore, one distinguishes between spatial, temporal and thematic navigation. (Neumann 2005)
Navigation:
The word navigation is originally a seafaring term. Navigation describes the process of estimating one's present position based on various tools. In earlier times wind, tide and currents acted as navigation instruments and today there are maps, magnetic compasses and even satellite-guided GPS systems that are used as navigation instruments.
Ordinal Scale:
A measurement scale in which numbers indicate rank (from highest to lowest). There is no zero point in the rank order, and the differences between the ranks do not need to be equal.
Pan:
With panning you can reposition or re-center an information space such as a map on the screen.
Precise Navigation:
Precise navigation is when one exactly knows what information is to be extracted out of an application. The corresponding tools let the user quickly go to the location he/she is looking for.
Radar:
"Radar is a system that uses radio waves to detect, determine the distance or speed of objects such as aircraft, ships, rain and maps them." (Wikipedia)
Space Perception:
"Process through which humans and other organisms become aware of the relative positions of their own bodies and objects around them. Space perception provides cues, such as depth and distance, that are important for movement and orientation to the environment." (Encyclopedia Britannica)
Spatial Navigation:
Spatial navigation is the process of orienting and moving through a virtual environment (University of Edinburgh). Spatial navigation is mainly used in interactive 2D maps as you will see in further chapters
Temporal Navigation:
Some multimedia applications contain a temporal component. In each time span (minutes, hours, days, etc.) happened specific events that are visualised in the application. Navigating between these events is temporal navigation.
Thematic Navigation:
Thematic navigation controls the thematic information of a multimedia application. In web pages this is normally the navigation between different files. In interactive 2D maps, thematic navigation often allows to change the appearing of the map or to extract thematic attributes or values out of the map.
Typography:
Typography is the art and technique of selecting and arranging type styles, point sizes, line lengths, line leading, character spacing, and word spacing for typeset applications. These applications can be physical or digital. (Wikipedia)
User Profile:
User profiles are brief studies of the sort of person who might visit your application (Fleming 1998).
Zoom:
With zooming you can enlarge or reduce a portion of a information space (e.g. map or image) to see it more clearly or to get a better overview.


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