protected RectTile createTile(Sector tileSector){
  Extent extent=Sector.computeBoundingBox(this.globe,this.verticalExaggeration,tileSector);
  return new RectTile(extent,this.density,tileSector);
}

protected RectTile createTile ( Sector tileSector ) { Extent extent = Sector . computeBoundingBox ( this . globe , this . verticalExaggeration , tileSector ) ; return new RectTile ( extent , this . density , tileSector ) ; }
creates the tile for a specified sector .
