I'm looking for a small GPS data logger for geotagging photos, and I've had trouble finding one that meets my requirements:
Small, key-fob size would be ideal. It should also store its tracks on on-board storage.
I will be carrying it around on my person for days at a time.
Good battery life (16 hours per charge and/or on-the-go USB charging or replaceable batteries)
I can't be fussing with it or stopping to charge during the day.
Records accuracy information (HDOP, VDOP, PDOP, satellites in view, etc)
I want to be able automatically filter out bad data during post-processing.
I've been able to find plenty of units that meet requirements 1 & 2 (see below), but 3 seems like more of a specialist thing and I have had a hard time finding information about what supports it.
I've already tried two loggers, but they've had issues:
Holux M-241: Runs on Alkaline AAs (only high quality), but you need to change them every few hours or it gets flaky (often resulting in data corruption). It was apparently hackable with earlier firmware revisions to get accuracy info, but the newer versions (which I have) clear the nonstandard config on startup.
Canmore GP-102+: Nice form factor and very good battery life. However, some of the tracks it recorded had really inaccurate sections (probably when the signal was poor) and I had to spend a lot of time editing out the nonsense by hand. Stores tracks in .fit files that are accessed like a flash drive. GPSBabel does not appear to find accuracy info in them when I convert them to GPX.