title: How to launch external app (NDrive) from iphone app
body: <p>I want to launch ndrive from an iphone app with coordinates. 
  I tried this, but don´t know the parameters for the coordinates.</p>
  
  <pre><code>NSString *stringURL = @"ndrive//";
  NSURL *url = [NSURL URLWithString:stringURL];
  [[UIApplication sharedApplication] openURL:url];
  </code></pre>
  
  <p>Anyone know what URL Scheme to use? I searched the web but couldn´t find an answer. </p>