Text description (graphics and charts)
When information is part of a graphic, include it in an alternate form.
When information is part of a graphic, include it in an alternate form.
Issue: A graphic has a significant amount of text embedded in it and is distributed as an image (ie. JPEG, PDF). When text is saved as an image that information is effectively hidden from assistive technology users.
Who’s affected: People who are blind, people with some visual processing difficulties.
WCAG standard: Guideline 1.1.1 – Text alternatives – Non-text content
What to do: If you can summarize the content in a few sentences, use the caption. (or the alt text if no caption is available). If the description requires more than a few sentences:
You may also want to provide a link to the full data set in an accessible format (see document accessibility).
Recommended tools: The Diagram Center has a pretty comprehensive set of guidelines for charts and graphs.