Re: [talk-au] Increased precision options for Australia - QZSS, SBAS or Galileo

[Warin]

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 > 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 > 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


- 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? ..
___
Talk-au mailing list
Talk-au@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-au

Re: [talk-au] Increased precision options for Australia - QZSS, SBAS or Galileo

[nwastra]

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

> On 12 Jun 2018, at 12:56 PM, Andrew Harvey  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  > 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-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
> Talk-au@openstreetmap.org 
> https://lists.openstreetmap.org/listinfo/talk-au 
> 
> 
> 
> ___
> Talk-au mailing list
> Talk-au@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-au

___
Talk-au mailing list
Talk-au@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-au

Re: [talk-au] Increased precision options for Australia - QZSS, SBAS or Galileo

[Andrew Harvey]

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  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-
>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
> Talk-au@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-au
>
>
___
Talk-au mailing list
Talk-au@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-au

[talk-au] Increased precision options for Australia - QZSS, SBAS or Galileo

[Alex Sims]

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-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
Talk-au@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-au