I have several cameras that have a built in a GPS, so that the images already have GPS data in their EXIF metadata. With the iPhone location history bust, I would think that more people will be playing around with the history file and coming up with innovative uses. The downside is its drains battery, a lot. In the mean time, I use my cell phone's GPS for logging directly into GPX format. Maybe if I got laid off, I will be right on it. I think I know what I need to do but I just don't have the time. So I will need a better algorithm to make tagging quality comparable to real GPS. And none of my photos will be tagged with the right geo-location. If I blindly convert into timestamps, my long stops will be translated into slow travel time from the last spot. As my route is not continuous and usually I stop at a location for some time and continue. But more thinking leads me to understand that the problem is not that simple. I figure I could write a program and convert the XML file to use real timestamps. My understanding is they are not standard and they used string types to present date/time and essentially turning my route as a bunch of serialized point-of-interests. I was studying the XML files generated by Latitude.
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