These type of maps choose what link the user will follow based on where the user “clicked”. Not really ever a need to use.
To meet requirements of Server Side Image Maps:
Provide alt-text for image used in image map
Provide text-equivalents for links used in image maps
Method:
Use “ismap”,“usemap”, and “alt” attributes of IMAGE tag.
<a href=“mymap.map”><img src=“serversidemap.gif” ismap usemap=“Amap” alt=“Map of North Carolina”></a>