Great mosaics! They would have been even more awesome if you included a pixel scale on each of them, just to put things into perspective.

Europa is really an intriguing world, amazing how smooth it looks from a distance, yet has one of the more rugged surfaces close up.

It's actually remarkable how Galileo's old CCD was very capable of producing crisp images, a fact often forgotten thanks to heavy image compression out of neccessity...
Imagine the coverage of these worlds if the HGA was operational! I only wish Cassini was able to capture rapid footprints like this and get long imaging swaths as well.

this work is just amazing !
Do you use the pds images ?
Are you planning new mosaics ?

I use the SPICE kernels and information provided to us where we download the raws (similar interface to the PDS) to navigate each image in a program called ISIS (publically available from the USGS website).  I refine those solutions using a combination of limb fits, tieing to a basemap, or tieing to adjacent images.  once I am confident that the lat and lons in my images are accurate, I can use ISIS to reproject each image to the same geometry.  For the Dione and Tethys mosaics released recently, those are orthographic projections centered on the same lat and lon and with the same pixel scale.  For public release products, I just piece these together in Photoshop, just to speed things along.  I can also mosaic the images in ISIS, but often that's a slower process.

I'd think a way to approach it might be to use the SPICE kernels to get the instrument pointing as a function of time. It's possible to get the intersection of the camera boresight and the surface of the target (longitude, latitude) for any given time. That would give the lon/lat of the center of the image if the time that it was taken is known.

Unfortunately, the Cassini website doesn't give the time, just the date of each photo. But it does give the distance, so the spacecraft distance could be  used as a proxy for the time. There would be some error, but it might give the location within a degree.