horizontalAccuracy and desiredAccuracy in location,iphone
<p>After <code>didUpdateToLocation</code>,my new location (CLLocation) is </p>

<blockquote>
  <p>newLocation = [37.785834  -122.406417]</p>
</blockquote>

<p>Then I am printing the <code>horizontalAccuracy</code> of newLocation  <code>desiredAccuracy</code> of locationManager (CLLocationManager) and they are</p>

<blockquote>
  <p>horizontalAccuracy is 5.000000</p>
  
  <p>desiredAccuracy is 10.000000</p>
</blockquote>

<p>My question is where these number come from....Are they changing if you move to another new location.</p>

<p>Moreover, right after I create and initialize CLLocationManager, its desiredAccuracy is -1.Again, is -1 a default value for CLLocationManager ?</p>

<p>Please advice me about these issues. </p>

<p>Thanks</p>
