I am working on with .net 2.0 compact framework on a pocket pc device and the camera doesn't automatically tag the image with GPS exif data (unlike iPhone).
I have looked around for already existing open source libraries that i can use in order to write GPS Exif data to a JPEG image but i haven't come across much. I did find a few examples; one on SO and some others on CodeProject however it requires the full version of the .net framework and i'm not sure if it actually created the GPS IFD or not (to work with other programs).
I have looked at the EXIF file format and it is going to require a bit of work for me to manually add the GPS IFD tag and then the GPS data without screwing up the previous IFD offsets and so forth, so i thought it'd be worth my time looking for an already existing library/tool that i can use in my project.
If no tool exists then i will have to write my own. Which i don't really have a problem with, it will just take me longer than if something already existed.