Client-side image maps shall be provided instead of server-side image maps except where the regions cannot be defined with an available geometric shape.
Because polygons can be used to describe any area to as much detail as desired, it makes sense to use only client-side image maps instead of server-side maps. Be sure to include the alternative text for each area of the map and the main map image itself. The later may will be alt="" since the important information and function is in the regions of the map.
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