code: public void setFlatGlobe( boolean doMercator ) {
          EarthFlat globe = new EarthFlat();
          globe.setElevationModel(new ZeroElevationModel());
          wwd.getModel().setGlobe(globe);
          wwd.getView().stopMovement();
          GeographicProjection projection;
          if (doMercator) {
              projection = new ProjectionMercator();
          } else {
              projection = new ProjectionEquirectangular();
          }
          globe.setProjection(projection);
          wwd.redraw();
      }
docs: Set the globe as flat.
  
  @param doMercator
  if <code>true</code>, mercator is used as opposed to lat/long.