[Qgis-developer] Is QGIS supports dynamic display?

[Zoltan Szecsei]

On 2014/08/11 04:11, ?? ? wrote:
> Dear all,
> I'm a new developer of QGIS using C++. I am doing a project which 
> needs dynamically displaying maps/layers(just like GPS,layers 
> automatically refreshing with the changing of object's position).I 
> kown ARCGIS has the technique called dynamic diasplay(or something 
> like that),which supports the capacity to do such things. Is QGIS has 
> this ability? Any advices would be appreciated!
>
> Regards
> Bob
>

Hi Bob,
QGIS can definitely do this already.
I used this feature in November last year - but make sure you use the 
latest versions of QGIS of all the plugins for field editing because at 
that stage some of the (digitising, I think) plugins caused serious 
loops when refreshing the screen or adding a feature, so not great if 
you are dynamically panning.

I used a Garmin 60CSX, but any gps that can output an NMEA stream should 
work.
You also need the free versions of Franson GPSGate from http://gpsgate.com/

On a practical note, I found dynamic panning not very useful for my 
purpose. When we drove passed a POI, we couldn't easily pause the 
panning in order to drop a points and add the attributes needed. We 
found the dynamic tracking (digitising) of the incoming GPS track very 
useful, and we manually panned the display as needed, whilst in motion.

HTH,
Zoltan


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Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

P.O. Box 7, Muizenberg 7950, South Africa.

Mobile: +27-83-6004028
Fax:    +27-86-6115323     www.geograph.co.za
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