We already had this discussion several times already. We do not delete the wikipedia image placeholder pages used for commons images. The commons image itself is stored at the commons. The wikipedia placeholder page provides info not provided by the commons page. Such as the list of all the wikipedia pages using the commons image. Also, it is part of wikipedia image classification in categories. If you have questions about map and image categorization please ask the authorities at Category talk:Maps. 

See also the previous discussion on this talk page you are reading now, and see Category talk:Maps of the Palestinian territories. Also see [abuse of speedy deletion by Jayjg] and Image talk:Is-wb-gs-gh v3.png. This has all been thoroughly discussed before.