Charts and Diagrams in Videos
If you are presenting a chart or diagram in a video, which is common during class sessions and educational video supplements, you must describe the information in the chart or diagram audibly as you ask that others engage with the visual. In most situations, this may not be any different from what you already do to describe a concept presented visually, but it is a requirement for digital accessibility.
Providing Accessible Documents or Web Pages
If you choose to provide an additional accessible document or web page that describes the chart or diagram, that may be helpful for some who are trying to understand the information. However, it is not an alternative to describing the chart or diagram out loud if the visual is presented in a video.
Making Charts and Diagrams Accessible as Images
If you're sharing your chart or diagram as an on-screen image, you have a few options for communicating the information in a non-visual way for those who, for whatever reason, cannot see it.
Write Alt Text to Describe the Information in Words
You can add alt text as you would to any other image, describing the information and relationships communicated in the chart or diagram. Since alt text does not allow for paragraph breaks or formatting, your description may get very long or convoluted. If that's the case, you can make an accessible spreadsheet or other document with your data.
Present Data in a Separate, Accessible Document
If your data or information can be presented in a spreadsheet, you can create an accessible spreadsheet document and provide the link to the accessible document in a readily available place near the image of the chart or diagram .
Word Documents and PDFs
If your data or information is better described using headings and paragraph text, you can create an accessible Word document or PDF where you write out the description of the chart or diagram and provide the to the accessible document link in a readily available place near the image of the chart or diagram.
Describe the Information On-Screen
If the content on the screen describes the exact same same information that is presented in your chart or diagram and someone who could not see the chart or diagram would not lose any information by not being able to see it, you do not need to write alt text or provide an accessible document because you have already provided an accessible way of engaging with the information.
Example of Describing a Diagram
The information in the diagram below would not be available to those who cannot see the image unless the diagram is also presenting as a spreadsheet or described in words.
Clear, Descriptive Alt Text or Accessible Description for the Above Diagram
You probably wouldn't use a spreadsheet for the above diagram, so if you were to describe it in words, either in alt text, on-screen, in a separate document or verbally, it might go something like the following:
A triangle diagram with three sections, each labeled and coming together to the center that has the words University of South Carolina. The first section has the words Access and Transparency: reimagining the student experience and advancing post-graduate success. The second section has the words Inclusive Excellence: increasing research and scholarship to drive community and economic impact. The third section has the words Service and Integrity: transforming service delivery and promoting operational excellence.