About the date and time stamp
The most important component of linking photos to GPS position is the date and time stamp on your photos.
When you take a photo with your digital camera, your camera records the date and time the photo was digitized and saves that information to the photo. GPSPhotoLinker reads the date and time stamp from the photo's metadata and uses the date and time to sync with your GPS data.
Time zone
Your GPS records dates and times with time zone information; your camera, however, does not. This means that you need to specify the time zone your digital camera's clock was set to. For example, the UTC Offset for Pacific Standard Time (PST) is -8 hours, or -0800.
- Setting the time zone
- Consider using UTC for your camera's clock: Ensuring accurate date and times on your photos
- Adjusting the time on your photos
Daylight Saving Time
During the summer months this means that you need to add another hour to the UTC Offset. For example, the normal -0800 offset for PST, is really -0700, aka Pacific Daylight Time (PDT).
Camera clock
Camera clocks tend to drift. However, incorrectly set camera clocks can be corrected for and it is remarkably easy to achieve accuracy down to the second.