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Geocoding photos from waypoints requires more work on your end, both in the field and at the computer, but it's generally more reliable than using a GPS tracklog since you don't have to worry about the potential issues associated with converting the local times of photos to the UTC times in the tracklog.
You won't be able to determine the photo direction by using the PhotoDirFromTracklog option or by entering relative directions. That requires a tracklog. The best strategy for recording the photo directions when using waypoints is to save them into the waypoint comment field and then later manually enter them. If you use a magnetic compass to obtain these directions, be sure to specify the MagneticDeclination value before entering the directions into the main grid.
This option allows you to manually assign a waypoint's location to each photo. The waypoints can be obtained either by downloading them direct from a Garmin GPS unit or by importing them from a GPX file.
To use this method you must record a waypoint at each photo's location. Be sure to give the waypoint a descriptive name so you'll be able equate it to the correct photo when you're back at the computer. You may also want to add something to the waypoint's comment field to aid in its identification. Most digital cameras sequentially number images - it's a good strategy to do the same when naming the waypoints.
When the 'Select Waypoint' form loads, you'll need to load the waypoints. You can do this either by downloading them from a Garmin GPS or by importing a GPX file. The currently selected images will be on the left and the GPS waypoints, upon loading, will be on the right. For each image, select the corresponding waypoint. To undo a selection, click the 'Cancel' button. To cycle through the images, click the 'Next' and 'Back' buttons. When done, click the 'Done' button.
Unlike the method of manually assigning waypoint locations to each photo, this allows you to automate the process.
Each waypoint in the imported GPX file must have a time and that time must be in a <time> child element. Note that some Garmin GPS models write the current time to the comment field when a waypoint is recorded. This time is not used by RoboGEO or by other compliant programs because the Garmin Protocol does not allow it.
Upon importing the GPX waypoint file, each photo is geocoded using the location of the waypoint having a timestamp that's closest to the photo's EXIF timestamp and, unlike imported tracklogs, the program does not perform any type of interpolation to determine the final photo location.
The WaypointImageMaxTimeDifference preference option allows you to specify the maximum time difference between the EXIF and waypoint timestamps.
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