If they're not in sync you can get round this by applying a time offset when geotagging the images, but it's easier to just have them in sync in the first place. This is why it is important to make sure the time on your GPS and camera are in sync. By comparing the time of each photo to the timepoints recorded in the tracklog, the software can work out where along the tracklog the photo was taken. Then you can later use some software to geotag all your photos from the tracklog. As you walk around, the GPS keeps a log of where you've been. You set the GPS unit to record a tracklog and make sure that your GPS and camera are both set to the same time. This method of geotagging will work with any camera. Standard GPS units can be purchased for less than the camera specific GPS accessories, and depending on the model, can also be used to aid navigation. An alternative to purchasing a camera with built-in GPS or a specialist GPS accessory for your camera, is to use a standard GPS unit, and record a tracklog.

Expert gps geo tagging photos