[QGIS-Developer] Message to list

[Matthias Kuhn]

Hi Greg, Hannah


On Mon, Jan 4, 2021 at 3:06 PM Greg Troxel <gdt at lexort.com> wrote:

>
> Hannah Wait <Hannah at land-scope.com> writes:
>
> > I work at a land surveying company and have a question on QGIS and
> QField if anyone can help with.
> >
> > We are currently looking at uploading the 'Survaid' data with accurate
> > positioning and exporting as a shapefile with the attributes in to
> > QGIS. Do you know if there is a way to get the higher accuracy of
> > external GPS to feed into QField on our tablet at all?
>

With the current stable QField  (1.7) you need to use a mock application
(like ntrip client) to connect an external GPS.

However, the latest release 1.8 supports directly connecting to an external
GPS via bluetooth. That gives you access to all the GPS data.
This version is still in beta, so you have to

 a) either install it from the apk (available from the release page
https://github.com/opengisch/QField/releases/tag/v1.8.0)
 b) install the qfield dev app (
https://play.google.com/store/apps/details?id=ch.opengis.qfield_dev&hl=en&gl=US
)
 c) join the "beta" on the play store app of qfield

Stay tuned for a soon-to-come 1.8.1 with plenty of refinements on this
front (already available in option b above)


>
> QField is on my list of things to try, but I haven't yet.
> (Unfortunately it is not on f-droid so I'll have to build it from
> source.)
>

Have a look at the release page link above, there are apks to download.

Matthias


> This query probably belongs on the QField mailinglist, but that appears
> to be remarkably difficult to find.
>
> On Android, I can see three approaches.
>
>   I use Vespucci, which is an openstreetmap editor.  It has support for
>   an external NMEA source, via a TCP connection.  One can put a phone in
>   hotspot mode and have the external device (e.g. Ardusimple WiFi NTRIP
>   Master with a simpleRTK2B F9P, and you are almost certainly using
>   something higher end!) get RTCM3 data, and have Vespucci get the RTK
>   solutions as high-precision NMEA.  This takes you out of GIS proper
>   into OSM, which uses tags instead of layers, even though it's
>   basically the same thing.
>
>   Modify QField to have the same sort of feature as Vespucci.  You are
>   apparently not the first to want this:
>     https://github.com/opengisch/QField/issues/536
>
>   Use Android's "mocking" debug feature, which involves some program to
>   talk to the external GNSSr and inject location into the system, so
>   that programs see that location information.   I gather people do this
>   with QField, from skimming their github repo.  See
>     https://qfield.org/docs/fieldwork/gps.html
>
> Greg
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