Suunto Ambit mapping vs. OpenGPS…

Side by side comparison of the map and stats of the track recorded on the Suunto Ambit and simultaneously tracked using the OpenGPS app on my 4G phone.

Ambit

The data from Movescount.com and the data stored on the watch says 2.38 mile total distance. But when I load the GPX track in to Google Earth (via GoBreadcrumbs.com) the track distance is 2.8 miles.

OpenGPS

The actual stats from OpenGPS show a total distance of 2.9 miles AND you can see in the map below it shows MUCH better accuracy of the route. If you zoom in on the map you can see the THIS track actually follows the trail indicated on the map very closely. The track above from the Ambit does not perform as well.

My biggest problem with this comparison is the Ambit’s distance tracking. I don’t mind a sloppy GPX track, especially if I’m just tracking fitness runs. But the half-mile difference in distance (especially considering the total hike route was less than 3 miles) is troublesome.

Speed Tracking

This is another place where the Ambit advertises superiority. The Suunto speed tracking software us supposed to be super accurate and sensitive to stops and starts. Looking at the speed charts below, I think you can see that the Ambit does perform better when tracking overall speed and variations in speed.

Ambit

OpenGPS

Has anyone else experienced similar issues with the Suunto Ambit? I’d really like to test it against Garmin’s new Fenix if they’d let me.

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