Our receivers work fine in Australia as I live in Canberra and work for the Swift Navigation engineering department. Using one of the free CORS stations here I can get 2cm positions from my car. Mind you the setup cost ~$2000.
Australia has only moved 1.8m since 1994. http://theconversation.com/australia-on-the-move-how-gps-keeps-up-with-a-continent-in-constant-motion-71883 Unfortunately OpenStreetMaps only uses "WGS84" as it's datum which is not that well defined compared to a surveying datum like GDA94/2020 or ITRF, and most existing data has only been measured to a few metres (at most). So I wouldn't worry too much about the drift as there are other larger sources of error in OpenStreetMaps. The SBAS trial is available to anyone with a receiver that can be set to use PRN 122 (e.g. Ublox devices). Thanks, Leith Bade [email protected] On 12 June 2018 at 12:56, Andrew Harvey <[email protected]> wrote: > If you use RTK https://en.wikipedia.org/wiki/Real-time_kinematic you > should get centimeter accuracy, but expect to pay $10k+. > > https://www.swiftnav.com seems like a cheaper option but not sure if it > works in Australia and it not a consumer device, seems they just sell the > boards. > > ...once you obtain sub-meter accuracy, keep in mind the whole continent is > moving so even if you had no error in your GPS, a node someone entered in > OSM in 2007 from GPS would be almost a meter out from someone entering it > into OSM today. > > The SBAS trial was only aviable to selected people as part of the trial, > does anyone know if it'll will work on regular devices, or will we need to > run additional software, for Android, iOS? > > On 12 June 2018 at 12:39, Alex Sims <[email protected]> wrote: > >> Hi, >> >> >> >> I’m really wanting to have better accuracy from GPS for use with >> Openstreetmap. I can use survey marks and a laser rangefinder, but having a >> portable GPS would make so much easier to fix errors where objects have >> been armchair mapped or even GPS mapped with errors up to 3 meters. >> >> >> >> I have tried three approaches >> >> - QZSS – I can see this on my Android mobile phone but it doesn’t >> seem to be used. It seems as though I need a Japanese market device and >> even then I’m not sure I’ll get an increase >> - Galileo – looks promising but when I’ve tested on supported devices >> (friends who have recent phones) the accuracy isn’t delivered. Further >> investigation shows that there aren’t enough satellites in service yet >> most >> of the day to give 4 visible. (Using GNSS View http://qzss.go.jp/en/ >> English text) >> - Lastly the SBAS trial from Geoscience Australia - >> http://www.ga.gov.au/scientific-topics/positioning-navigatio >> n/positioning-for-the-future/satellite-based-augmentation-system >> >> <http://www.ga.gov.au/scientific-topics/positioning-navigation/positioning-for-the-future/satellite-based-augmentation-system> >> - nothing magical has happened with any of the consumer grade devices I >> have access to. Also not sure how to test on an Android device if it is >> being used. >> >> >> >> Has anyone obtained sub-meter accuracy from any of these approaches, it >> must be possible? >> >> >> >> Please discuss. >> >> >> >> Alex >> >> _______________________________________________ >> Talk-au mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/talk-au >> >> > > _______________________________________________ > Talk-au mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-au > >
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