title: Creating street block overlays from google map data or other map APIs
body: <p>My question is the following: How can I grab 'blocks' in a city for use in a game? (And then display them shaded in a certain color?)</p>
  
  <p>My general idea is to use real blocks of your city in a game, that you can own/sell.</p>
  
  <p>I want to display the areas you own as polygon overlays in google maps.</p>
  
  <p>Are google maps the way forward, or are other APIs like OpenStreetMap, etc, more useful for this?</p>
  
  <p>Any pointers would be appreciated, like general algorithms of what data to grab and how to construct 'blocks' out of it, or API calls that could return a block/house level polygon for me.</p>