Hi! Today (Tuesday, February 21, 2012) at 07:18 Guttorm Flatabø chipped in: >> On Mon, Feb 13, 2012 at 8:12 PM, Jaakko Helleranta.com >> <[email protected]> wrote: >> Could someone recommend essentially GPS logger solutions that
> Some time ago I bought the cheapest logger available on Dealextreme: > http://www.dealextreme.com/p/usb-gps-rechargeable-65-channel-data-logger-dongle-black-58695 > at 26 USD worldwide, incl. shipping. > The advantage of the one on Dealextreme is the price. Apart from > that, there's not much that can go wrong I suppose. But as for > accuracy it is probably not among the best. It's really cheap. However, my experiences with cheap devices is, that you can't rely on their results. One day, you get a good recording, and the other day you get complete crap. They use cheap chipsets, and - what's worse - cheap antennas. If satellite positions or sky view is suboptimal, they start recording fantasy-coordinates. And you cannot tell the difference (you cross a mountain, one one side the track is accurate, on the other side it has up to a few hundred meters offset). Of course also devices are sometimes inaccurate, if conditions are bad. But they still return useful data. I recommend to use cheap devices only if you plan mass usage, so that you'll get at least three (better five) tracks for each road. Otherwise, please invest in quality! -- Bye Bye, Boris _______________________________________________ HOT mailing list [email protected] http://lists.openstreetmap.org/listinfo/hot
