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### 8.3.6 Image maps

If you have specified markers for the polar plot (by setting the mark property of the plot) each marker can be a hot spot in a client side image map. The target URL are as usual specified with the SetCSIMTargets() as the following short code excerpt shows

`// Start by specifying the proper URL targets
$targets = array("#1","#2", ....... );
$polarplot = new PoalrPlot ($data);
$polarplot ->mark->SetType( MARK_SQUARE);
$polarplot ->SetCSIMTargets (targets);
$graph->Add( $polarplot);
$graph->StrokeCSIM();`

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