title: Getting building data at a coordinate
body: <p>I would like to be able to click on a building on a map and get the polygon that comprises the building at the clicked coordinate.</p>
  
  <p>I looked into overpass api and tried the following:</p>
  
  <pre><code>&lt;query type="way"&gt;
    &lt;around lat="51.0566036" lon="13.7181033" radius="30"/&gt;
    &lt;has-kv k="building"/&gt;
  &lt;/query&gt;
  &lt;union&gt;
    &lt;item/&gt;
    &lt;recurse type="down"/&gt;
  &lt;/union&gt;
  &lt;print/&gt;
  </code></pre>
  
  <p>If I choose a large <code>radius</code> I get too many buildings. If the <code>radius</code> is too small I don't get any buildings. Using <code>bbox-query</code> did not help. </p>
  
  <p>I also tried <code>coord-query</code>, but I was not able to construct a meaningful query. The necessary query syntax seems to be different. </p>
  
  <p>Is there a better approach at hand? Even withouth overpass, I have just to look into it.</p>