GPS Photo Tracking

Today I reVentus G730 GPS Loggerceived my Ventus G730 GPS Route logger.

It’s an older thing, but I bought it used at a fair price.

It came with everything original, and it didn’t seem like it’s been used more than for 5 min. On Windows 7 I had to get the latest software, get the driver from a 3rd party location than the vendor site. And I ended up with having loads of issues with google map API etc.

Moving on to a more fun and up-to-date operating system; Linux., and in my case Kubuntu.

The dongle is seen with no problems in Linux, I only had to install the skytraq-datalogger and digiKam. digiKam is in the debian repository, and is a very powerful picture application. The deb package from this site makes it easy to install on a debian distribution, like ubuntu and it’s alternatives.

Anyway I had some problems, atleast I thought I had problems, getting the skytraq-datalogger to communicate with the GPS tracker. It turned out that it complains there is no GPS tracker when the storage is empty. I hung the GPS in the handle of our window  and opened it a tad, after a couple of minutes, and a few pictures taken I had data to play with.

Something to remember, set the time properly on the camera before starting. digiKam uses the timestamp of the camera and the timestamp of the GPS data to sync up.

skytraq-datalogger --dump > tracks.gpx

was all I needed to type, in a shell, to dump my data. digiKam v2.5.0 can import this format without any conversions.

Import the pictures from the camera to the local harddrive. Don’t forget that adding GPS data to an image’s EXIF data also modifies the picture, so make sure you have a backup.

In digiKam you can now select all the pictures you’ve taken while the GPS tracker was recording locations. Image -> GEO-Locations. Open the Geo Correlator pane, import the GPX file using the Load GPX button, make any changes if you need, i.e. camera time is the same as system time. Correlate, and apply.

Congratulations, you have now added geo locations to the selected photos. The can be added to several applications to show on the map where the picture was taken.

And a nice preview of digiKam’s suggestion to the location.

Picture is from the Imperial War museum in London, which is worth a visit.


Another good example is the Church near St. Mary Magdalene Primary School and Little Venice (London Westminster)