Thesis on visualisation of geodata
Christiane Surken
Multitasking and visual geoinformation processing - Capabilities of users with geovisualization tools
When working with the computer, humans often do multiple tasks at once. The exploration of
geographic data with cartographic visualization software tools may be seen as a cognitive, step-wise process. In this process visual representations of the data are providing insight in the data. When triggered by this visual representations people might abandon the step-wise method and start multitasking. Does this mean that people who are better in multitasking benefit more from cartographic visualization software tools than others? And does this mean that women benefit more from these software tools as you often hear that men cannot multitask and women are good at it?
Supervisors:
Professor: Menno-Jan Kraak, ITC
Supervisor: Corne van Elzakker, ITC
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Roy Lammers
Creating temporal cartographic animations from an incomplete input of graphics
The research investigated how temporal cartographic animations (animations that show a sequence of static maps with differences in world time) can be created in such a way that perceptual problems are less likely to occur. In order to establish the illusion of continuous change in an animation it is necessary to show at least 15 images per second. Therefore, it requires many input images to create an animation of acceptable length. These images are often not available and have to be created by using an interpolation technique based on the available images. The speed with which the objects in an animation change depends on these techniques and on the total duration of the animation. When the objects change too slowly, the perception of change is not optimal. Therefore, tests have been performed for all kinds
of animations to see when people can or cannot see changes. Recommendations about the techniques and the duration of the animations have been given based on the results of these tests.
Supervisors:
Professor: Menno-Jan Kraak, ITC
Supervisor: Connie Blok, ITC
Reviewer: Stan Geertman, UU /Sisi Zlatanova, TUD
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