Checkpoint 1.7 - Wikis
All image maps are client-side and have accessible features
WCAG 1.0 Priority 1
WCAG Guideline 9. Design for device-independence.
Image maps provide a different visual relationship between content and hyperlinked information. Being primarily a visual tool, the hyperlinked information component of the image is not able to be accessed by some assistive technologies.
Server-side image maps can only be used with a mouse while some people with disabilities, such as people with Parkinson's Disease or Cerebral Palsy, can only navigate through a site with a keyboard.
All image maps must be client side.
All client-side image maps need to be marked up properly. For more information see: All active regions of a client-side image map are also listed as redundant text links.
When using an image map:
- All regions must have an
- All the image map hotspots must have an
altattribute that indicates the target of the hotspot
- All active image hotspots must be at least 35 pixels square.
<img alt=" "src="/images/map.gif" height="200" width="250" usemap="#local_map" /> <map name="local_map"> <area shape="poly" alt="Town A transport map" coords="97,93, 87,101, 84,95, 76,95, 73,84" href="town_a.htm"> <area shape="poly" alt="Town B transport map" coords="84,82, 89,68, 77,67, 72,70, 67,82" href="town_b.htm"> <area shape="poly" alt="Town C transport map" coords="123,93, 123,99, 118,104, 97,93" href="town_c"> </map>
- Internet Explorer - AIS Toolbar:
Images > Show Image Maps
The original source of this information is located on the W3C web site (www.w3.org/TR/WCAG10-TECHS/#tech-client-side-maps)