One of my big passions is photography. I’m quite old-school as I mostly use a big DSLR, post-process my shots on the PC and upload some keepers to Flickr. But I’m also using my mobile phone camera more and more. Nothing beats the convenience of snapping a shot and being able to upload in one sweep. Some people, like me, just have a mental barrier to overcome, the technical perfectionism. A shot can be fun and interesting even if you haven’t spent hours tweaking it. I’m working on that…
Sharing photos on the net is fun, but did you know how much a single picture can tell? I’m not talking about the traditional “more than 1000 words” here. I’m talking about metadata. This is invisible data that describes the content and is embedded in the picture file. This is some of the data that a photo can contain:
All this data does really provide a lot of added value. You can automatically have shots sorted by capture time, you can plot photo locations on maps, find all shots taken with a certain camera or lens, and so on. The possibilities are almost endless. But metadata is like all other great things, it can be used and misused. The downside is naturally privacy.
I did a quick test with my Nokia Lumia, which is a Windows Phone -device. It turned out that its camera embeds the date and time, photographic parameters and the GPS-location automatically. But data about the owner is not included. This data is also kept when using all share-options that I currently have available; mail, Flickr, Facebook, SkyDrive and DropBox. There’s no setting anywhere that would control this behavior. In theory, I could reveal my exact location every time I upload a photo.
But this is not the full story. The service that you upload to can also decide how to process metadata. Facebook strips it altogether. This design was probably implemented to save storage space, but has a positive side-effect on privacy. Photographers who are interested in the photo parameters are however not happy. Flickr uses a different strategy. Metadata is extracted and used in the interface. You can decide if you want it to be showed or not. Users can also download smaller picture files without metadata, or the original with all data intact, if you choose to allow it. It’s quite natural that Flickr is more advanced as it is a site focusing on photo sharing.
So what should I do about this?
To summarize. You do not necessary have a privacy problem with metadata in photos you share. It depends on many factors. The device you take photos with, the software you use to process and transmit the shots and finally the site where they are published. And naturally your own privacy expectation, what data are you ready to share? But the most important point is to be on top of this yourself. Don’t leave it to chance. Check what you share and make up your mind if it’s OK or not.
An exercise for you. Download the photo file in this post and check what kind of metadata you can find in it. It’s taken straight from my workflow program on the PC, no data removed.
PS. Also keep this in mind if you feel tempted to cheat about when and where a shot is taken. You are unlikely to get away with it if you have photo-savvy friends.
Photo by Micke-fi @ Flickr
Two of the top five sites on the internet are search engines, which makes a lot…
September 12, 2016
This is really an old problem, but it’s in the headlines again. Pokémon Go is…
August 16, 2016