title: PHAsset Location -- GPS MetaData, what's wrong?
body: <p>trying to add location from a UIImage using Phasset:</p>
  
  <pre><code>// image is a variable like so: image: UIImage
  
  var newAsset = PHAssetChangeRequest.creationRequestForAssetFromImage(image)
  newAsset.location = CLLocation(latitude: coordinate.latitude, coordinate.longitude)
  </code></pre>
  
  <p>this code works, apparently -> save a new asset into the photo library with the good coordinate. I can see it in the library itself.</p>
  
  <p>but when I use exif tools and similar, most of the time, GPS dictionnary is empty as if location was not set. 
  (also, I noticed GPS info is not in exif format)
  so I guess, location information is also somewhere else... </p>
  
  <p>so what's wrong with location property of PHAsset ?
  how can set properly location ?</p>