A technology incorporated into many cameras and other devices, which allows them to be discovered by satellites for the purpose of recording location information. This data is typically embedded into the image itself as part of its metadata.
On sale: 14th Feb
We introduce the new and improved look of What Digital Camera with 102 camera reviews, while in a high-resolution battle, the Sony A7R and Nikon D800E go head to head, plus we've put together an essential guide to Wi-fi.
Which of the new cameras announced so far this year are you most excited about?
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