On 12/06/18 13:05, nwastra wrote:
There is expected to be improved gps accuracy in a few years time in
Australia but unsure if usual gps units used by the public will show
improved results but I expect they will.
http://www.ga.gov.au/news-events/news/latest-news/ceo-statement-on-budget-2018-19
Government talk 'a few years time' = beyond our next election. Could be
10 years ... or never.
On 12 Jun 2018, at 12:56 PM, Andrew Harvey <andrew.harv...@gmail.com
<mailto:andrew.harv...@gmail.com>> 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 <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 <a...@softgrow.com
<mailto:a...@softgrow.com>> 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.
Ha. 3 meters is the 'best' you might get. Typically it is 10 meters. And
both those measurements are at 1 sigma.
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
https://en.wikipedia.org/wiki/Quasi-Zenith_Satellite_System
* 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-navigation/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.
Theoretically possible. But
1) is it implemented - ie available for use.
2) are units available?
3) what accuracy is available at a 'realistic' price for consumer use?
Don't hold your breath.
You noticed the improvement with the inclusion of the Russian
Satellites? ..
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