4 posts
A color tool for accessible schemes

Leonardo is an open source project from Adobe that helps you pick accessible colors. There’s a JavaScript API along with a browser tool that lets you select colors interactively. Color is a common encoding to visualize data. It can be used directly in choropleth maps or heatmaps, indirectly as a redundant encoding, it can be decorative, and it can be used for all the things in between. However, a color...

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Visualization accessibility

Øystein Moseng for Highcharts provides a brief guide on making your visualizations for accessible. Guideline #4 on not relying completely on color to show the data: Relying on color as the only means of communicating information is a failure of one of the basic WCAG success criteria. This is because many users may not be able to distinguish between the different colors used. Data labels, symbols, annotations and tooltips are...

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Charts as a medium for expression

Christine Sun Kim, a deaf artist known for her work visualizing and creating experiences around sound, recently took up charts as a medium. From Anna Furman for The New York Times Style Magazine: Channeling her experiences into images of geometric angles, musical notes and meme-like pie charts, Kim playfully combines different sign systems to create what she calls a “common language that all people can connect to.” What’s she’s reading...

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Mapping global accessibility to cities

From The Malaria Atlas Project, a global map of estimated accessibility to cities: In the present study, we quantify and validate global accessibility to high-density urban centres at a resolution of 1×1 kilometre for 2015, as measured by travel time. The last global mapping effort to measure accessibility was for the year 2000, a time that predates both substantial investment and expansion of transportation infrastructure and an extraordinary improvement in...

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