title: Checking if object in Open Street Maps is a building
body: <p>I'm using Leaflet library in my ReactJS app and I wonder if there is a simple way to recognize if object clicked by user is a building. 
  Idea that came up to my mind is to check map colour under clicked position. 
  Does it make sense?
  I appreciate your help.</p>
  
  <p><em>Colleagues in comments advised to give some use-case:</em></p>
  
  <p>App I'm working on is meant to mark antique buildings with elevation in bad shape so city architecture management had simpler job of searching for them.
  Every user of this App can mark such building. To prevent hooligans from corrupting data with senseless points on map I wanted to validate as a first step if clicked point is a building.</p>
  
  <p>I hope it will clarify problem a little bit.</p>