[Qgis-user] Qfield on TDC600

[Bo Victor Thomsen]

Hi Ivan -

I've experienced similar problems with other GIS applications and 
platforms. In some of these cases, the problem was caused by the GPS 
delivering "to many" positions to the application. Instead of generating 
(perhaps) 1 fix/sec the GPS generated 10 fixes/sec and overwhelmed the 
input buffer in the application.

The visible symptoms is that the GPS position trails behind the actual 
position. If you stop walking, the the GPS position eventually catches 
up to the actual position.

You might try the slow the number of fixes/sec (if it's possible). This 
is just a guess. I have no experience at all with the Trimble TDC600 at 
all.

Med venlig hilsen / Kind regards

Bo Victor Thomsen

Den 04-02-2021 kl. 15:11 skrev Ivan Dananaj:
>
> I would like to ask you for advice with a problem that occurred after 
> installing the Qfield application (latest version, but also older 
> versions) on the Trimble TDC600 (android 8). I prepared a project in 
> QGIS (3.14.16).
>
> The cursor on the screen does not move at the same time as I move, 
> there is a delay of about 70 seconds. I'm also sending a picture where 
> I've tried to illustrate the problem. After I arrived at a certain 
> place, I immediately made a point in front of the entrance to the 
> building. The cursor at that time was about 100 m from that place and 
> the position of the point was also recorded there (showing accuracy 
> below 1m). The cursor was still moving to my place. By the time I took 
> the photo (using a widget for photos), the cursor moved to a place 
> about halfway between where I was standing and where the point was 
> recorded. The coordinates of the cursor at that time were assigned. 
> But the photo (towards the entrance to the building) was taken from 
> the place where I was standing.
>
> Occasionally, the cursor reached the actual position and pointed 
> accurately. But, if I wanted to add a new point, after saving, there 
> was a delay again after adding it.
>
> There was no such problem with other applications (LocusGIS, Google 
> maps, TerraFlex). The problem also occurred in these applications when 
> Qfield was turned on simultaneously.
>
> I have good experience using the Qfield app on other devices (Trimble 
> TDC100, android 5) or phones with higher versions of android.
>
> Can you help me how to solve this problem?
>
> Thank you.
>
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