Does it matter though? The iOS app already asks to get your location information. It's that same location info that would go into the putative EXIF tag, so Color already has the info. Or is there something else in EXIF that would be relevant in this case?
The user may have agreed to let the Camera app access their GPS data, but refused to let your app access their GPS data. For the case of Color, no it's not relevant. For the question posed by the (G?)GP, I think it is.
