title: Google Maps Qt client with heat map
body: <p>I am writing a Google Maps (and Open Street Maps) client in QT without QML. In principle it is easy to do with QGraphicsWebView. My problem comes because I am trying to overlay some information (a heat map, locators, etc) on it. </p>
  
  <p>I have tried to link the QGraphicsWebView object to a QGraphicsScene, but I don't know how to make the heat map and the locators to be "attached" to the map coordinates, so they behave properly when the user moves the map, zooms in/out, etc.</p>
  
  <p>Is there any way to make graphical elements to be associated to the maps coordinates?</p>