Mongo DB Radius Units for GeoQuerys
<p>I am trying to work out what unit MongoDB queries use...</p>

<p>I have the following query:</p>

<pre><code>User.objects(address__point__geo_within_center=[[lat, long],maxDistance])
</code></pre>

<p>I would like to user meters e.g. 10 meters within maxDistance.</p>

<p>But in the documention (<a href="https://docs.mongodb.com/manual/reference/operator/query/center/#op._S_center" rel="nofollow">https://docs.mongodb.com/manual/reference/operator/query/center/#op._S_center</a>) it says </p>

<blockquote>
  <p>"The circle’s radius, as measured in the units used by the coordinate
  system"</p>
</blockquote>

<p>I can not find a reference to "units" anywhere?</p>

<p>I have been using <a href="http://docs.mongoengine.org/guide/querying.html" rel="nofollow">http://docs.mongoengine.org/guide/querying.html</a> for ref.</p>

<p>What are the units?</p>

<p>Can i set the units?</p>

<p>Thanks</p>