2 The date and time the image was captured 4 The pixel dimensions (width and height) is This is important for checking the time a helpful in two ways. First, different cameras that picture was captured, but EXIF does not produce images of the same pixel count can indicate time zone. It can either reflect local produce images with different dimensions. For time or Coordinated Universal Time (UTC), instance, Fujifilm XT-2 and Leica M-D Typ 262 depending on device and settings. Some cameras produce 24 megapixel images, but with camera brands have their own metadata different pixel dimensions. The Fujifilm XT-2’s pixel tags that supplement EXIF, and may include dimensions are: 6000 x 4000 pixels. The Leica M-D time zone data. There is also a non-standard Typ 262’s pixel dimensions are 5976 x 3992 pixels. EXIF tag for TimeZoneOffset, which can Pixel dimensions may also provide clues if an indicate the time offset relative to GMT. image has been cropped. As a rule of thumb, Many media upload sites, such as YouTube, the width and height of an image should result default to Pacific Coast Time if the timezone in a whole number when divided by eight. The is not embedded in the image. You should resolutions of the majority of digital cameras also consider if the time and date settings are multiples of eight, which can be verified by of the device could have been incorrect. reviewing a camera’s technical specifications. This is more likely with a camera than a (There are exceptions to this rule, especially with smartphone, which often auto-updates time mobile apps and panoramic functions). and date settings. 3 The pixel dimensions of the image GPS co-ordinates of where the image was captured 5 The pixel count of the image Each camera shoots at different image sizes. For If the device capturing the image has GPS instance, an iPhone 5 produces an 8 megapixel capabilities (mostly smartphones, but some image, while a Samsung Galaxy S5 produces a cameras do too), and the person capturing 16 megapixel image. In the graphic here, we see the image has switched on these capabilities, that the image is 9.9 megapixels , i.e. 2368 x the EXIF data may show the GPS coordinates 4160 pixels (one megapixel = one million pixels). of where the image was taken. GPS stands You should raise a red flag and ask questions for Global Positioning System–a satellite of your contributor if the pixel count and location system. If available, most EXIF data dimensions do not match the sizes supported by viewers will show these coordinates on an the purported device. online map service. 29