I'm looking for a USB GPS receiver for turning a Raspberry Pi into a GPS navigation system.
- Thumb-drive-like form factor
- Compatibility with GPSD
- Low power (shouldn't be a problem with any receiver, but the Pi is somewhat touchy about USB devices drawing too much power).
- Price: less than $50
Nice to have:
- Support for satellite networks other than the US GPS system.
- Support for various accuracy-augmentation systems.
- Magnetic compass.