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2. Footer of photos contains option for (a) left-aligned prefixes of "TM -" and (b) users to insert their own right-aligned identifying alphanumeric text.
3. GPS location can be refined only by up to 100 yards. If the user changes the location by more than 100 yards these changes are discarded.
4. Notes section allows user to input notes regarding photos for later reference.
As more sophisticated time pieces became available to scientists, the need for a new international time standard became apparent. It became understood that due to the irregularity of the earth and the sun's movements, the exact time needed to be modified occasionally through the use of leap seconds.
With the need for precise accuracy of time, UTC was born. While based on zero degrees longitude, which passes through the Greenwich Observatory, is based on atomic time and includes leap seconds as they are added to the clock every so often. UTC was used beginning in the mid-twentieth century but became the official standard of world time on January 1, 1972.
UTC is 24-hour time, which begins at 0:00 at midnight. 12:00 is noon, 13:00 is 1 p.m., 14:00 is 2 p.m. and so on until 23:59, which is 11:59 p.m.
Because UTC time is indicated on the photo, users need to add/subtract their time zone differences to determine the image's local time. Users can find their time zone difference here: http://www.timeanddate.com/worldclock/difference.html