Extending web maps with video layers
Video maps contain georeferenced video streams that allow for new types of interactivity. For example, video layers can be combined with traditional vector layers, or the projection of a video layer can be adjusted by the user.
Design principles and algorithms for origin-destination flow maps
We develop algorithms for creating flow maps showing linear movements between two places with curved lines of varying width. The geometry of flows is bent to reduce the number of graphic conflicts among flows with the goal to increase readability.
Design for colour-deficient vision
Eight percent of men are affected by color vision impairment – they have difficulties distinguishing between colours. Barrier-free color design is important for this large group of readers.
Color Oracle is a free software application that simulates colour-deficient vision to help designers ensure their graphics are barrier-free.
Graduated dot maps: a new mapping technique
Graduated dot maps arrange dots with blue-noise patterns to avoid overlap and use clustering algorithms to replace small, densely packed dots with dots of larger sizes. Our user study indicates that map users can more accurately extract values from graduated dot maps than from traditional dot maps with a single dot size.
Altases for E-books
Map design for tablet computers
Digital cartographic atlases have replaced traditional paper atlases, but cartographers have not yet fully embraced the potential of multi-touch tablet computers, such as the iPad. We explore the characteristics of e-book atlases, which are positioned between traditional printed atlases and digital atlas information systems.
Navigating geovisualisation with gamepads
Globes, block diagram and maps can be connected with game devices, such as gamepads, opening new ways of interaction with geospatial visualisations.