[OSM-talk] Photo_mapping - How to put EXIF data into a jpg image

Greg Troxel gdt at ir.bbn.com
Mon Feb 22 02:03:40 GMT 2010


John Smith <deltafoxtrot256 at gmail.com> writes:

> On 22 February 2010 06:10, Jochen Plumeyer <jochen at plumeyer.org> wrote:
>> Be aware of your time zone (and daylight savings timezone as well) of your
>> camera, as GPX times are all in lon=0°/ Greenwich/ UTC/ Zulu time.
>
> Actually they are in GPS time, and have an offset in seconds from UTC
> embedded in the signal.

Huh?  I realize that GPS internally computes in GPS time (!= UTC, !=
TAI), but I have never seen an actual device output a track log in GPS
time - it's always been UTC.
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