![]() ![]() The y axis is labelled 'total cell cultures'. Each bar represents a successive week in the cell growth period. Instead, we can just describe how the data is presented: With a data table providing an interface for the granular inspection of the data, it's no longer necessary to clumsily cram all those numbers into the alternative text of the infographic. The source data can be presented in tabular form, using a table component: Not only will different people have format and presentation preferences, but any one person may simultaneously find interest in the graphical presentation and utility in the raw data.Ĭonsider the following infographic, which charts cellular growth, but categorized by the morphology of the individual cultures. By offering different means to consume the information, you meet different needs and cater for different abilities. Multi-dimensional data that can be represented as a chart or graph should also be provided as a data table. focusable="false": As in all cases where inline SVG is employed, focusable="false" prevents older versions of Internet Explorer and Edge from placing the (non-interactive) SVG erroneously in keyboard focus order.In most screen readers, the ARIA description is read after the label, with a pause to separate each of these announcements. Accordingly, aria-describedy (pointing to the 's id) is used to associate the caption with the image directly. However, this is not consistent or dependable across different screen reader software. aria-describedby: The should be identified by role, and its used to label it.aria-label: SVG does not support alt, so the alternative text is provided with the aria-label property.role="img": This ARIA attribute tells browsers to communicate to assistive technologies that the is a simple image element, and announce it as such.By the six week mark, these had begun to multiply and spread towards other areas of the cell-culture dish. Here is how one would mark it up, and might provide alternative text and a caption (with notes to follow): Īfter three weeks, some cultures had emerged, localized towards one side. Contrary to some misconceptions, a caption (provided as a in the code example to come) is not a replacement for alternative text.Ĭonsider the following, very simple visualisation. While the alternative text, describing the image non-visually, should be invisible, the caption should be visible and available to all consumers of the information. Caption: Explains what the infographic says an editorial summary of its salient points.Alternative text: Describes what is in the infographic a literal interpretation of its form.The alternative text describes, and the caption explains: The role of the alternative text and the role of the caption are distinct. In addition, some infographics should be accompanied by a caption. Labels and descriptionsĮvery infographic should be provided with alternative text to describe it to the visually impaired. Embedding SVG also reduces http requests and, most importantly, content reflows, by loading and rendering along with the surrounding content. Inline SVG (SVG embedded directly into the HTML) is the most malleable, since you can target individual SVG elements/artefacts with CSS and JavaScript. Unlike runtime-dependent graphics, can contain accessibility information, and be downloaded as a self-contained asset.Can be maintained and updated easily, like any other markup.Can be highly optimized, especially when using the simple shapes and paths recommended.Is scalable without degradation, facilitating zoom/magnification.However, it is highly recommended the SVG image format encodes the graphic itself. ![]() How you encode infographics, and what kind of textual alternatives you provide for them, depends heavily on the nature of the infographic in question. Alternative and complementary means of consuming the same data/information, provided to uphold the Offer choice inclusive design principle.The technical accessibility requirements of different types of infographic.As a complement to the GEL documentation, here we shall explore two topics: The visual design and labeling of infographics (or 'visualisations') is covered comprehensively in GEL. However, without careful and deliberate design they can be confusing, or even misleading. Visual and figurative representations of information can help readers to quickly grasp the salient points. ![]()
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