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I haven't seen any evidence that one brand or model of handheld GPS unit differs from any other model in its random or systematic errors. As far as I understand, the errors are determined by (1) the geometry of the satellites currently in the visible part of the sky from your location, and (2) the physics of the propagation of the radio waves (including ...

If you really do need exceptional accuracy, you could use the solution many Ingress players use - a good Android phone with a battery pack. In the game you often need accuracy of 2 or 3 metres - so the Galaxy S3 or a phone paired with the Nexus 7 (which has an excellend GPS) are the tools of choice. The game uses google maps and wireless navigation, as well ...

I live in Sweden and I hike a lot in the wild. My personal top three properties to look for in a handheld GPS receiver for The Great Outdoors: Battery life Battery life Battery life I honestly don't care if the measurement is 20 metre off. In the Swedish mountains, it usually isn't, there are no deep canyons, and if there are you can only go in one ...