CS1ToCR2 is Filemaker Pro-based application, designed to read GPS log files from the Sony GPS-CS1 device and match them up to RAW (CR2) image files captured on the Canon SLRs, on a Mac OS X computer.
The Sony GPS-CS1 captures GPS data in a modified version of the NMEA GPS format. This data is captured to log files and retrieved from the GPS-CS1 onto your local hard drive. Being a bit of a map geek, I was excited enough to buy the GPS-CS1, but I didn't do my homework. The GPS-CS1 does ship with a utility that will automatically match the data to JPEG images. Sadly there is no way for that utility to write the data to Canon RAW files, which is how I shoot. To boot, Sony's program only runs on Windows.
When I found this out, I decided to write my own program to do the matching and I found Phil Harvey's excellent ExifTool command line application would do the actual heavy lifting of reading and writing the EXIF data. Since I only program in Filemaker Pro, that's what I've used to write this app.
CS1ToCR2 is freeware. Use and Distribute freely. If you like it, please link to my site if you can (I'm trying to build some traffic).