title: Spotfire Map Chart - Show markers only in the highlighted(selected) area
body: <p>I am a beginner in Spotfire. </p>
  
  <p>I have lat long coordinates of employee work and home location. </p>
  
  <p>Here is what i have done so far.. on one marker layer I have marked the coordinates of all work locations and on other marker layer, I have marked home coordinates of all the employees. </p>
  
  <p>What i want to show initially on the map are only the Work locations and when the user selects any area on the map near any work location, then only the employees whose home locations are in that selected area should display.</p>