title: Python Visualization: Determining Data Attributes Visually by Mouse Hover and Click
body: <p>I am rendering very large X,Y,Z scientific datasets in the lateral plane and would like to click on the results to obtain greater textual detail about the area chosen by mouse-click.</p>
  
  <p>So, for example, imagine a scientific dataset which is rendered as a filled contour plot and there is a bright spot.  I would like to click on that spot to obtain a link or other textual information.  </p>
  
  <p>This would necessitate having another plane that would provide attribute information.</p>
  
  <p>I would be most appreciative for any direction that others have used in similar cases.  I expect this problem has been solved previously so I would prefer not reinventing the wheel.</p>