code: public void doMap(StaplerRequest req, StaplerResponse rsp) throws IOException {
          if (req.checkIfModified(timestamp, rsp)) return;
  
          ChartRenderingInfo info = new ChartRenderingInfo();
          render(req,info);
  
          rsp.setContentType("text/plain;charset=UTF-8");
          rsp.getWriter().println(ChartUtilities.getImageMap( "map", info ));
      }
docs: Renders a clickable map.