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When I send a picture to a friend (e.g. via Messages, Mail, or Tweet), is the location information in that photo preserved? In other words, can they see where I took that photo?

What about when I use 3rd party apps such as Facebook?

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Yes.

This is a feature usually only offered by professional photo software. Removing metadata (like EXIF or GPS) requires an additional step by the one that wants to share his/her photograph.

Aperture for example offers to export picture as either an original or a version. When you choose to export a version the meta- and gps-data is removed from the original.

I know from experience that sharing via the following options does not remove these and from pictures:

  • Mail for OS X
  • Tweetdeck for OS X
  • Uploading via a web browser

Here's what the metadata of an export as original look like:

enter image description hereenter image description here

Here's what the metadata of an export as version by Aperture look like. This is an exported version of the same original. The data will differ depending on the export options for a version.

enter image description hereenter image description here

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Given that the question asks "is location data is retained" and your answer clearly and correctly states that it usually is by Facebook or Twitter uploads, shouldn't your first statement be YES instead of No? –  patrix Jul 8 '12 at 8:11
    
@patrix Ups.... Mistake corrected :) –  gentmatt Jul 8 '12 at 8:34

No, the iPhone strips location data before sharing via Email or text message - whether you like it or not.

Now, this is true for the standard photo app in the iphone - this may not be true for 3rd party photo apps.

The official Facebook app for iphone also strips location info.

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