I have been geotagging my images for a few years. With the Hasselblad and Nikon, it requires a piece of gear hanging off your camera. The EM-1 has a really nifty feature for use with your iPhone. You load the OI.Share app go through a little syncing fiddle between camera and phone and you are away.
You get geotagged files straight out of the camera so there is no intermediate step between card and computer.
You get geotagged files straight out of the camera so there is no intermediate step between card and computer.