Hello Nicolas, My experience with the Holux data loggers (http://goo.gl/oRCpa [USD51] and http://goo.gl/hdWSh [USD56]) sold at DealExtreme is quite good.
With a 170,000~200,000 points memory, you can configure them to register every two seconds (more than reasonable), and that means 94~111 hours of recording. About the precision factor, in my opinion they have the same behaviour that most GPS receivers (including the etrex that we also use), the more time you stay still during the satellite fixing process, the better the track will be. The M-1000C has no "POI button" but it has a bigger antenna and battery, so I prefer it. Regards, Julio Costa Zambelli OpenStreetMap Chile [email protected] http://www.openstreetmap.cl/ Cel: +56(9)89981083 Postal: Casilla 9002, Correo 3, Viña del Mar, Chile On 2 March 2012 07:39, nicolas chavent <[email protected]> wrote: > Hey all, > > Just like to check with you if there are additional experiences with loggers > worth to take into consideration for inclusion in a hot hardware kit to be > deployed in projects. > Curious about how the first two devices compare to the kind of res you get > from garmin etrex legend hcx we have been mostly using in our work. > > Thanks > Nico > > 2012/2/21 Guttorm Flatabø <[email protected]> >> >> 2012/2/21 Boris Cornet <[email protected]> >>> >>> > 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. >> >> >> I see. Which means that it should supply HDOP values for it to be possible >> to assess the quality of the track. >> >>> >>> 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). >> >> >> Must say though, that my track didn't have any points diverging anywhere >> near more than 50 m, but I haven't really tested it much. >> >> -- >> Guttorm >> >> >> _______________________________________________ >> HOT mailing list >> [email protected] >> http://lists.openstreetmap.org/listinfo/hot >> > > > > -- > Nicolas Chavent > Humanitarian OpenStreetMap Team > http://wiki.openstreetmap.org/wiki/Humanitarian_OSM_Team > http://wiki.openstreetmap.org/wiki/WikiProject_Haiti > Mobile (Haiti): +509 4617 3334 > Landline (FRA): +33 2 97 26 23 08 > Email: [email protected] > Skype: c_nicolas > Twitter: nicolas_chavent > > > _______________________________________________ > HOT mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/hot > _______________________________________________ HOT mailing list [email protected] http://lists.openstreetmap.org/listinfo/hot
