Video Maps

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.
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A Year in the Life of Earth's CO₂, an interactive video map that visualises a high-resolution NASA computer model of global atmospheric carbon dioxide distribution.

Flow Maps

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.
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Migration in the United States, 2009–2013, an interactive flow map of migration in the United States using a force-directed layout. Map by Daniel Stephen.

Color Oracle

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.
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Dot Maps

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.
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Graduated dot map with three dot sizes. ©Atlas of Switzerland, sheet 51, 1977.

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.
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Game Devices

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.
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Web Map Design

Designing maps for the internet