![]() ![]() Map charts often have a lot of different areas, especially maps of entire countries or city/county maps, so writing out all of the points in an alt text or image description can get tedious. How to write alt text and image descriptions for map charts ![]() I recommend keeping image descriptions exposed or having a link to image descriptions in content so that users can benefit from the additional description. An image description serves as a descriptive caption, which is great for people with vision loss, language learners, or people with cognitive or processing disabilities. If an image loads correctly, alt text is invisible to users that do not use assistive technology.Īn image description is a longer description that is typically exposed, meaning anyone can see it whether they are using assistive technology or not, though users can also insert image descriptions in a similar manner to alt text that remain hidden. If someone fails to add alt text for an image, the screen reader will either simply say “image” or ignore the image entirely, which means that users miss potentially valuable visual content. Screen readers will read alt text aloud so that users who are blind or that have low vision can understand what is in an image. Nonvisual accessibility for map charts What is alt text? What is an image description?Īlt text is a short, written description that displays in place of an image if the image fails to load that tells people what is in an image, such as text, colors, or basic essential details. My Eight Favorite Free Fonts For Print Disabilities.Choosing High Contrast Color Schemes For Low Vision.In visualization tools, set font sizes in rem instead of pixels so that they are easier to scale up/down- some tools do this automatically.For text on a colored background, add a thin white outline to black text to make it readable on any color background.Consider placing the legend underneath the chart instead of on the side so that it is easier to reference with screen magnification tools. ![]() ![]() An example of poor contrast would be having gray text on a white background, while black text on a white background would be easier to read
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