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Re: Proper way to markup citations and detailed image alttext?

for

From: John Middleton
Date: Jan 16, 2009 11:20AM

While this reference is a bit dated (2001) you may get some ideas for
alt text images and chart graphics for greater accessibility.

This HTML document has a lot of graphics and charts.
<http://www.researchutilization.org/matrix/resources/survey2001/4_disabilityareas.html>;


Regards,
John Middleton
Web Administrator
SEDL
Disability Research to Practice
http://www.ncddr.org
http://www.researchutilization.org




Cliff Tyllick wrote:
> On Thu, Jan 15, 2009 at 2:05 PM, Dean Hamack < <EMAIL REMOVED> > wrote:
> And let's say you have a pie chart which shows percentages of something. I can easily create text that says "x=20%, y=50%, etc." but it seems like it might be a little long for an alt tag.
> Chris Hoffman < <EMAIL REMOVED> > replied:
>
> Why not have an accompanying paragraph that describes the data in the chart? It would be useful to all users, would fulfill the requirement of alternative text, and would make the contents of the chart indexable by search engines.
>
> Cliff adds:
>
> Dean, I realize that your pie chart is probably a theoretical example, but before you decide a pie chart is the best visual presentation of the data, you might check out any one of Edward Tufte's fine books at http://www.edwardtufte.com/tufte/books_vdqi. Among them, The Visual Display of Quantitative Information is likely to come closest to hitting the mark. His forum, http://www.edwardtufte.com/bboard/q-and-a?topic_id=1, is a great place to read expansions on this approach and includes at least one thread on pie charts: http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=00018S&;topic_id=1&topic=Ask+E.T.
>
> I mention this because so often the most significant barrier to accessibility is that the content is not usable in the first place, and so often the most significant barrier to usability is a failure to communicate clearly. The most accessible Web pages work well at all three levels.
>
> Cliff Tyllick
> Web development coordinator
> Agency Communications Division
> Texas Commission on Environmental Quality
> 512-239-4516
> <EMAIL REMOVED>
>