Troubleshoot a HTML5 page. The page displays a google map with polygons on top of the map. Each polygon represent an area of the city. The problem is that some polygons are not shown. I have all polygon hidden, When the current location is in a particular area (polygon), that polygon is shown (unhidden). Maybe the data is missing, corrupted or the script is reading it wrong. Maybe I need another data source. I created a screen video of the map. Please watch the short video. It is self-explanatory.