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Release History:
v1.0: 24 Feb 2005
Initial release.
v1.1: 1 Mar 2005
Instead of ignoring track segments, we record them now,
and by default don't interpolate between them. This can
be disabled, ie, match between track segments.
v1.2: (Not released until 1.3)
Added --machine/-o option. This outputs the tags from
the passed files in a machine-readable CSV output.
v1.3: 25 April 2006
It would appear that the Exiv2 API changed somewhat.
And gpscorrelate didn't work. Reported to me by a friendly chap.
Now fixed to work correctly with the latest Exiv2 v0.9.1.
v1.4: 28 May 2006
Added option to preserve mtime on input photos. Patch submitted
by Russell Steicke. (
Also added patch to make GPX read correctly in non-C locales -
would interpret "." as thousands seperator in some locales.
v1.5: 24 Feb 2007
Fixed very silly bug where it would segfault on certain GPX files.
Turns out those GPX files don't have time data on the trackpoints,
and this is due to that track coming from certain parts of the GPS
memory (where the timestamps get stripped to save space on the GPS
device itself). This is something gpscorrelate should have handled.
v1.5.1: 3rd April 2007
Included patch from Marc Horowitz (an MIT one) to correctly remove
all GPS tags when using the "remove GPS tags" feature. It seems my
original code missed two. The patch instead iterates over the tags
and removes anything starting with "Exif.GPSInfo". Thanks!
v1.5.2: 6 June 2007
- Fixed bug where program would die with uncaught exception if input
files were not JPEGs at all. Now the exception is caught.
- Fixed very silly bug where timestamps were incorrectly calculated:
in struct tm, I didn't realise that tm_mon was 0-based, and didn't
decrement it. This caused failures on dates spanning months with
different numbers of days. Because the timestamps inside EXIF data
and the timestamps from GPX data were converted the same way, the
matching still worked. The date part is written as GPSDateStamp,
which is wrong, and thus a --fix-datestamp option is provided.
- Turns out GPS Timestamp wasn't correct either. This time was out
by the local timezone. This did not affect matches. --fix-timestamps
will fix this as well.
- Added a --version option.
v1.5.3: 20 June 2007
- GPS coordinates, including altitude, are not written as Rational
values instead of Signed Rational values, this now meets the EXIF
- Default format for writing coordinates is now DD MM SS.SS. The old
behaviour can be forced with the --degmins parameter.
- If altitude is negative, the correct sea level reference value is
now written.
v1.5.4: 22 June 2007
- Added Photo Offset time, as a fine adjustment between photo time and
GPS time. Read the docs to understand it.
- GUI now has extra settings, and a "Strip GPS tags" button.
- GUI Now remembers settings on exit, into ~/.gpscorrelaterc. These are
reloaded next time the GUI is started.
v1.5.5: 20 August 2007
- Made altitude data in GPX files optional. This should have been the case
since the beginning, but it seems it was not.
v1.5.6: 1 October 2007
- Incorporated patch from Marc Horowitz that allows gpscorrelate to correctly
calculate negative timezone adjustments. Previously, the minutes were not
subtracted from the timezone adjustment.
v1.5.7: 21 September 2008
- Fixed a bug where altitude data was not read correctly if the value was
negative - instead it would read positive. It was always written correctly,
though. Thanks to Andrzej Novak for pointing this one out.
- Added an 'install' target to the makefile provided by Till Maas. Thanks!
- Update the GUI to remember the last directory for Photos and GPX data when
using the file chooser dialog. This also persists across program invocations.
This was suggested by Till Maas.
- Added Makefile.mingw32 contributed by Julio Castillo, which allows cross
compliation on Win32. This also included some cross-platform patches for the
code, which is greatly appreciated.
v1.5.8: 1 November 2008
The 'Till Maas' release.
- Added gpscorrelate.desktop contributed by Till.
- Added patches for the Makefile by Till, to improve the installation.
- Added manpage, originally from Debian, but converted to XML by Till.
- Added patches for the Makefile by Till, to configure and install the manpages.
- Added patches by Till to remove compilation warnings.
- Thanks for your work!
v1.5.9: 4 April 2009
Incorporated patches from the new Debian maintainer:
- Fixes crash on empty tags
- Fixes writing of negative altitudes.
- Fixes display of negative altitudes.
- Fixes invalid use of Exiv2 toRational().
Thanks Eugeniy for organising all these fixes; you did all the work - I just
applied the patches you supplied.
v1.6.0: 5 April 2009
Added another patch that I forgot to include in 1.5.9. Thanks again Eugeniy.
v1.6.1: 13 February 2010
- Added desktop icon created by Till Maas.
- Added a patch to fix future build issues on Fedora.
v1.6.2git: TBD
- Dan Fandrich took over maintenance of gpscorrelate
- Now writing GPSTimeStamp tag as unsigned rational, as per spec
- Now writing GPSDateStamp tag as ASCII, as per spec
- Added automatic time zone offset detection by default (the previous
behaviour can be selected with "-z 0")
- GUI now displays the version number in the title bar
- File loading dialogs now have appropriate filters on file extensions
- Stop documenting the -p option, which never worked (--degmins hasn't
been touched)
- Store GPS coordinates in such a way as to preserve the number of
significant figures of the original data
- Use pkg-config to get the exiv2 compiler flags when building
- Renamed OFLAGS to LDFLAGS in the Makefile which is a more common name
- Use presence of the GPSLatitude tag instead of GPSVersionID as an
indicator of the presence of GPS tags (some cameras write
GPSVersionID even when they don't write any GPS location tags)
- Don't record a GPSMapDatum tag if the string is blank
- The -g option can be used multiple times to specify multiple GPX files
- GUI now allows multiple GPX files to be selected
- Exit status in command-line client now reflects if any image
encountered a fatal or nonfatal error
- Fixed NULL pointer dereference with GPX files containing a
single point
- Stop ignoring the last point in a track with --no-interpolation
- The progress graph that shows while processing many images on a slow
machine is now displayed as the files are processed.
- --machine output is no longer dependent on the current locale
- Fixed time calculations spanning DST discontinuities
- Only write an altitude tag if it exists in the GPX file
- Prevent duplicate GPS tags in the final file (which could
happen if some tags already existed before correlation)