Read Exif GPS data using UIImagePickerController

[haniar]

Hi,

I would like to read the GPS data (lat / lon) for a picture that has been selected by the user using UIImagePickerController.

Selecting the picture works but how can I access the geo data?

I have looked at iphone-exif (iphone-exif - Project Hosting on Google Code) project but it does not seem to work with UIImage.

Any suggestions

Thanks

[michelle]

Originally Posted by haniar

Hi,

I would like to read the GPS data (lat / lon) for a picture that has been selected by the user using UIImagePickerController.

Selecting the picture works but how can I access the geo data?

I have looked at iphone-exif (iphone-exif - Project Hosting on Google Code) project but it does not seem to work with UIImage.

Any suggestions

Thanks

I don't think you can, seems like the raw image in the private folder retains the exif but not after going through the imagepicker. Unfortunately if you try to access the private folder, almost for sure your app is going to get rejected.

My solution was to track the location info seperately storing the image in a seperate database. For me this was cleaner than playing with the exif data.

I suppose if your app is for add-hoc only you could use the private api, but anything go to the app store I wouldn't.

I think the exif-iphone project was intended to add the info back in, but that project is gpl license, which means you can't use it in your commerical app.

[kruptworld]

Originally Posted by michelle

I don't think you can, seems like the raw image in the private folder retains the exif but not after going through the imagepicker. Unfortunately if you try to access the private folder, almost for sure your app is going to get rejected.

My solution was to track the location info seperately storing the image in a seperate database. For me this was cleaner than playing with the exif data.

I suppose if your app is for add-hoc only you could use the private api, but anything go to the app store I wouldn't.

I think the exif-iphone project was intended to add the info back in, but that project is gpl license, which means you can't use it in your commerical app.

hey, how did you do it? im going nuts. i want to make an open source app which when a photo is taken and you upload it to my server an kml file is made from the geo tags in the photos. but when i upload photos from the uiimagepicker there is no tags in it, only photos taken with the native camera app. please help me out.

[FoJjen]

remove....

[FoJjen]

i use...

  - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    if (popover) {
        [popover dismissPopoverAnimated:YES];
    }
    NSLog(@"imagePickerController");
    [picker dismissModalViewControllerAnimated:YES];
    
    ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
    if (picker.sourceType == UIImagePickerControllerSourceTypePhotoLibrary) {
        
        [assetslibrary assetForURL:[info objectForKey:UIImagePickerControllerReferenceURL]
                       resultBlock: ^(ALAsset *myasset) {
                           CLLocation *loc = ((CLLocation*)[myasset valueForProperty:ALAssetPropertyLocation]);
                           CLLocationCoordinate2D c = loc.coordinate;
                           
                           longitude = c.longitude;
                           latitude  = c.latitude;
                       }
                      failureBlock: ^(NSError *err) {
                          
                      }];
        
        
        [assetslibrary release];
..........
    }