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Every time you take a photo with your cell phone, there's a good chance your location is being stored along with the photo. Cell phones with GPS often default to storing this information when the GPS is turned on. And some point-and-shoot and dSLR cameras also have GPS built into them.
Too Much Information?
For the most part, this information is helpful for remembering where you traveled and for making photo books of your vacation. But if you post your photos on a photo sharing account or a public blog, this same GPS-based data could also lead people to your home, your place of work, or even your child’s school. If this makes you feel uncomfortable, it’s easy to take back control over your privacy.
For future photos, simply turn off the GPS location storage in the camera settings of your cell phone or camera. In the meantime, you may want to remove the location data from your existing photos.
How do you know if the location is saved in your pictures? You can peek inside the file to see what’s written in the Exchangeable Image File Format (EXIF) data. On Windows 7 PCs, you can right click on any image file to view its Properties. Under the Details tab, you'll find a section for GPS. On Macs, launch the Preview program and open your image. Select Tools, then “Show Inspector and click on GPS.
It's Not Too Late
There are a couple of ways to remove the location information from your photos. First, you can download a simple program that strips out the EXIF data. For Windows PCs, try Easy Exif Delete or iPhoto Exif Cleaner for Mac (both are free on cnet.com). These programs will indiscriminately remove all of the EXIF data.
For more serious photographers, EXIF data can be valuable. In addition to time and place, you can look up the equipment that was used to take the photos and the settings that were used to take the shot, including flash, focal length, exposure time, and ISO, among others. If you want to retain that information, you can use programs to selectively delete just the location information. There’s PhotoLinker ($49.95 after free 30-day trial on earlyinnovations.com) for Macs and PictoMio (free on pictomio.com) for Windows PCs.
Facebook and Flickr users don't need to worry. Facebook deletes all of the EXIF data, including location, when you upload your files. On Flickr, you need to actively opt into sharing it with others.
With these tools for managing your privacy, you can feel confident that what needs to stay private stays private.
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