title: How to use geowithin in mongodb?
body: <p>I got an unexpected result when using <code>$geoWithin</code>,</p>
  
  <p>I've this:</p>
  
  <pre><code>perim = 10
  center = [35.964734, 5.03952]
  </code></pre>
  
  <p>if i run:</p>
  
  <pre><code>list(db.users.find({"adr.cor":{"$geoWithin":{"$center":[center, perim]}}}))
  </code></pre>
  
  <p>I get a result  that contains further coordinates, for example: <code>[36.743954, 4.365041]</code> which is further! (at least 400km)
  what am i doing bad?</p>