GeoTagGPX
Description
GeoTagGPx is a freeware program written by
NDW Ltd. Its purpose is to add Lat/Long information to a JPG file by parsing a GPX track file. It was written because the author could not find any suitable freeware to perform this simple task. It is a
Windows 'DOS' program, working from the command line, the is no graphical interface, but should there be sufficient feed back, one may be produced.
Installation
Simply unzip the contents of the ZIP file into a directory on your PC.
Usage
GeoTagGPX -g D:\photo\*.gpx -d D:\photo\ -o -60
where
where
| -d | JPG directory, there must be a trailing '\' |
| -g | Path/name of the GPX file, can be *.gpx |
| -o | Offset. The number of minutes to add/subtract to the GPX track time to match the date in the JPG file, the default is zero. |
| -h | This Help display |
| -v | Program version |
| -x | Diagnostic |
Hints
To find out what the date/time the JPG file was taken just run "exiv2 -pt file.jpg" or click on a thumbnail in the upload photographs page.
To get the GPX time simply view the GPX file in a text editor and look for something like this:-
To get the GPX time simply view the GPX file in a text editor and look for something like this:-
<trkpt>lat="52.922043712"
lon="-1.298146825">
<ele>71.755490</ele>
<time>2006-09-17T08:38:27Z</time>
</trkpt>
The way I work is to create a directory on my PC, e.g. d:\photos and copy the JPGs from the camera and the GPX file into this directory, I then have a .bat file I run that simply contains these lines:-
GeoTagGPX -g D:\photo\*.gpx -d D:\photo\
pause Press any key to continue
Background
This is a very simple program, it uses the free ware program exiv2.exe from
http://www.exiv2.org/ to read and modify the JPG file, see the file exiv2-man.html for more information about it, which can be found in the download zip file as
well..
When the program runs it will create several files, these are used internally and can be ignored.
When the program runs it will create several files, these are used internally and can be ignored.
| _output.tmp | This contains all the EXIF data from the JPG file, this is parsed to get the Exif.Photo.DateTimeOriginal data |
| _error_jpg.txt | Any errors that are found whilst parsing the JPG file |
| err_cmd.txt | Any errors that were produced when using the cmd.txt file |
| cmd.txt | The command file used to update the JPG file |
Bugs
Please report any bugs or suggestions via our forum or the contacts page at
GPSSharing.
Version History
Version Description 1.00 Initial release 1.01 Tidied up the display 1.02 Found bug when converting rational values. 1.03 Improved precision when checking date/time values.
Added elevation details.
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