[Qgis-user] QField: recommendations for aerial basemap preparation?

[Bernd Vogelgesang]

Hi Wouter,

unfortuantely, the area is located in Germany, well-known for its
horrible mobile networks coverages. There are some spots where you even
can't make SOS-calls.

So for the years to come WMS, is a bad to no option. But I'll give it a try.

Cheers,

Bernd

Am 25.03.19 um 09:44 schrieb Wouter Impens:
> Hi Bernd,
>
> It's possible to load a WMS layer in your project for Q-field, maybe
> that's a solution?
> But then of course you need an internet connection all the time...
>
> Greetings
> Wouter
>
> Op zo 24 mrt. 2019 om 21:37 schreef Bernd Vogelgesang
> <bernd.vogelgesang at gmx.de <mailto:bernd.vogelgesang at gmx.de>>:
>
>     Hi,
>
>     I need an aerial basemap for my QField-project to be able to locate
>     positions. As QField has not the ability to navigate to a point or
>     indicate the direction of movement, provided only with a topographic
>     basemap, I'm stumbling through the forest and have a hard time finding
>     the positions.
>
>     The project area is huge, around 400 square kilometers! I have a Mrsid
>     file of the area of 1.6 GB with 20 centimeter resolution,
>     transformed with gdal_translate to tiff is 42.5 GB,
>     compressed with gdal_transform with jped-compression 50% 968 MB,
>     resampled to 40cm resolution and 50% jpeg has 295 MB
>
>     I used the QField sync plugin to generate a baselayer in gpgk-format
>     from this ,which has 540 MB with 40 cm resolution.
>
>     Unfortunately, on the tablet, the baselayer is loading so slow,
>     that it
>     is impossible to work with it. Each redraw takes around 10 seconds in
>     the small scale, rising to infinity in higher scales.
>
>     I wonder if there are other approaches recommendable, for example
>     splitting the image into separate layers for bigger regions, which I
>     could then turn on and off, or if I should prepare the image apart
>     from
>     using the plugins converter to gpkg.
>
>     Due to the enourmous amount of time needed to process the image on the
>     PC, a trial-and-error approach seems not to be feasable, so I ask
>     you if
>     someone can recommend an approach for such a huge beast.
>
>
>     Thanx in advance,
>
>     Bernd
>
>     _______________________________________________
>     Qgis-user mailing list
>     Qgis-user at lists.osgeo.org <mailto:Qgis-user at lists.osgeo.org>
>     List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>     Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20190325/279da97d/attachment.html>