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  1. PO
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    <p>After much searching I found and adapted this </p> <p>This turns cclocation data into a suitable NSDictionary </p> <pre><code> #import &lt;ImageIO/ImageIO.h&gt; +(NSMutableDictionary *)updateExif:(CLLocation *)currentLocation{ NSMutableDictionary* locDict = [[NSMutableDictionary alloc] init]; CLLocationDegrees exifLatitude = currentLocation.coordinate.latitude; CLLocationDegrees exifLongitude = currentLocation.coordinate.longitude; [locDict setObject:currentLocation.timestamp forKey:(NSString*)kCGImagePropertyGPSTimeStamp]; if (exifLatitude &lt;0.0){ exifLatitude = exifLatitude*(-1); [locDict setObject:@"S" forKey:(NSString*)kCGImagePropertyGPSLatitudeRef]; }else{ [locDict setObject:@"N" forKey:(NSString*)kCGImagePropertyGPSLatitudeRef]; } [locDict setObject:[NSNumber numberWithFloat:exifLatitude] forKey:(NSString*)kCGImagePropertyGPSLatitude]; if (exifLongitude &lt;0.0){ exifLongitude=exifLongitude*(-1); [locDict setObject:@"W" forKey:(NSString*)kCGImagePropertyGPSLongitudeRef]; }else{ [locDict setObject:@"E" forKey:(NSString*)kCGImagePropertyGPSLongitudeRef]; } [locDict setObject:[NSNumber numberWithFloat:exifLongitude] forKey:(NSString*) kCGImagePropertyGPSLongitude]; return [locDict autorelease]; } </code></pre> <p>Then I add it to the existing metadata that you get through the camera (which doesn't by default have the gps data) </p> <p>I get the original metadata like this</p> <pre><code>-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{ [imageMetaData setDictionary:[[info objectForKey:UIImagePickerControllerMediaMetadata] copy]]; } </code></pre> <p>then I add the gps dictionary the previous method produces.</p> <pre><code>[imageMetaData setObject:currentLocation forKey:(NSString*)kCGImagePropertyGPSDictionary]; [library writeImageToSavedPhotosAlbum:[viewImage CGImage] metadata:imageMetaData completionBlock:photoCompblock]; </code></pre>
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    1. POSaving Geotag info with photo on iOS4.1
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    1. USToby Evetts
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      1. VTUpMod
    1. COGood answer, +1, but you're setting `kCGImagePropertyGPSTimeStamp` wrong. The value must be an NSString rather than an NSDate.
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      1. USAnomie
    2. COYou don't need to `copy` the dictionary that is the object for `UIImagePickerControllerMediaMetadata`; telling a mutable dictionary to set itself to match another dictionary will modify the receiving dictionary, so that dictionary becomes the copy. The copy you make with the `copy` message is wasted; worse, since you don't release it, you leak it. You could solve that by releasing or autoreleasing it, but better to not make the unnecessary copy in the first place.
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      1. USPeter Hosey
 

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