GPS CorrelateĪnother option for geotagging digital images is GPS Correlate. Alternatively, you could add the metadata to XMP sidecar files. Choose the Settings menu below Configure digiKam, select the Metadata tab, and enable the option labeled If possible, write metadata to raw files (experimental).
If you want to write data to RAW files, you will need to enable the option for writing metadata in the digiKam configuration. You can stop the action by pressing the Apply button, which tells the program to write the data to the images. Try to find out why they were not matched: Missing a track? Faulty Exif data? If you want to position the images manually, now is the right time to do it. Images that the application did not map are at the top of the list. The easiest way of doing this is to open the images as a list and then sort them by latitude. If you receive an error message, look for non-correlated images. If you have defined an offset, check that the sign is correct. To check whether the correlation was successful, check randomly selected images to see whether they were positioned correctly on the map. Pressing Correlate accepts the data in the images. You can either position the images on the map with your mouse to associate the image with the corresponding coordinates, or you can use using the GPS Correlator tab on the right margin ( Figure 1).įigure 2: If necessary, adjust the navigation device's time with the time the camera stored in the Exif tags. When you select Edit Coordinates, digiKam displays a wizard to let you associate your photos with locations on the GPX track. You will find it under Image | Geolocation | Edit Coordinates. If you already use the open source digiKam photo tool to manage images, you might already be familiar with a feature called Edit Coordinates, or something similar – the name has changed several times in recent versions. The programs ignore tracks that you recorded on days other than the days the images were processed. You can collect all your tracks in a directory and specify all the files to correlate.
The coordinates of each track must exist in its own file. Once you have the GPX tracks for the tour, you can start tagging. If you favor a GUI, the GPSBabel tool does have a graphical interface named Gebabbel, but my impression is that Gebabbel doesn't really make using GPSBabel much easier, because it also ultimately requires input at the command line. To convert, for example, a FIT file, use the garmin_fit option as a parameter for the GPSBabel program ( Listing 1). The GPSBabel program supports almost all relevant formats and lets you convert relatively easily. You can use a tool called GPSBabel to convert virtually any track format. For instance, today's Garmin devices use the FIT (Flexible and Interoperable Data Transfer) format, which you will need to convert to GPX to use it with the geotagging tools described in this article. Converting Your Trackįor many years, most GPS devices supported GPX format out of the box however, some recent devices now use other formats. This article describes a pair of tools for geotagging digital images: digiKam and GPS Correlate. The device will record the data as a track that you can then display using a mapping tool. Turn on GPS tracking on your smartphone or GPS device, then start walking or riding. A GPX track is a log of coordinates from a recent hike or road trip. Most of these tools work with a GPX track. The good news for users of these cameras is that Linux has some tools that will let you add location data to digital images after the pictures are taken. But conventional digital cameras, even many premium cameras, don't have a way to sense and record GPS data. Most smartphones, which typically have built-in GPS capabilities, automatically add location data to captured images. Some mapping tools will even let you plot the geotagged images on a map you can click an icon on the map and see what the view was like from that location. Storing location data with the image makes it easy to document where the image was taken. Many image formats let you store the GPS coordinates for the image location as metadata.
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