Malcolm Coles | How to make your infographics accessible and SEO friendly at the same time ::ALT tag/metadata critical::

The trick to make infographics accessible and SEO friendly is to ensure:

• they’re chopped into relevant sections (ie not one big image),
• text is text (you should be able to select it with a mouse)
• if anything has to be shown as an image, you set appropriate ALT text (the flipside of this is that, if the image doesn’t add any information, you DON’T set ALT text…)

Adding metadata to infographics, photos, layouts, PDFs, everything should be a required part of the skill set for all modern professional journalists.