MapWebMercatorProjection.fromPixelToMapPoint Method
        
 Determine the longitude and latitude based on the pixel representation of the Top-Left, width and height of the viewport.
 
         
        Parameters
        
            - x
            
 
            - 
                
Type: Number
Location of x-point (Left) on the page. 
            - y
            
 
            - 
                
Type: Number
Location of y-point (Top) on the page. 
            - width
            
 
            - 
                
Type: Number
Width of the viewport. 
            - height
            
 
            - 
                
Type: Number
Height of the viewport.