If the data (rather than just the trend) shown in a complex figure are important, it may be useful to include the data table used to construct the graph near the image, or in another section, to allow people to find the detail they are looking for. This is good practice for all audiences, not just those who need assistive technologies. However, take care to make the included table accessible or add the data to your alt text (see Alternative (alt) text):
Interactive graphs – for example, ones that can be zoomed and focused or in which the data can be filtered to plot various subgroups – can be developed using HTML5, JavaScript, and other software tools and plugins (open source and proprietary). Such graphs require alt text, including explanation of how to interact with them. Further coding may be required to ensure that people who use assistive technologies such as screen readers will always be able to access an alternative representation of the data presented. AccessibilityOz(Opens in a new tab/window), in collaboration with the Bureau of Meteorology, has developed fact sheets and guides on accessibility for interactive displays, JavaScript, HTML5 and coding (see Learn more about graph accessibility).