How do I correct the iOS7 photo app's location guess? iOS7 organizes photos into automatic groups. It labels each group with a location. It often chooses the wrong location.
For example if you're at the supermarket it might say "Anytown Post Office" if there happens to be a post office near by

How do I correct it with the correct location? In the example above I want the group labeled "Supermarket" instead of "Post Office"
You can edit this in iPhoto on your mac, but only on the local copy not the Photo Stream copy. On the iPhone you'd want to get a metadata editor app such as EXIF-fi ($.99)