Provide text alternatives that serve the same purpose as the selectable regions of an image map, using the alt attribute.
Engine scans the page for <area>
elements that are missing an alt attribute.
Users who use assistive tools, such as screen readers rely on a descriptive information to detect the content and controls.
<map name="planetmap">
<area shape="rect" coords="0,0,82,126" href="sun.htm" alt="example_Sun">
<area shape="circle" coords="90,58,3" href="mercur.htm" alt="example_Mercury">
<area shape="circle" coords="124,58,8" href="venus.htm" alt="example_Venus">
</map>