Hi Andreas, It's all on the page in the QField docs on the link in my last mail :)
Matthias On 09/22/2016 10:06 AM, Neumann, Andreas wrote: > Hi Matthias, > > Oh - thanks for the hint. So probably Reginald is just missing the > pyramids in the geopackage - to be created, f.e. with gdaladdo. > > Andreas > > On 2016-09-22 09:56, Matthias Kuhn wrote: > >> QField does not (yet) support tiff with jpeg compression. >> >> See: >> http://www.qfield.org/docs/project-management/dataformat.html#raster-data >> >> GeoPackage worked quite nice in our experience and can also be built >> in different resolutions (same page further down). >> >> Matthias >> >> >> On 09/22/2016 09:37 AM, Neumann, Andreas wrote: >>> Hi Reginald, >>> >>> You can use the JPEG compression inside Geotiff. Note that this can be >>> specified separately for both the full resolution and the pyramids. You >>> can also select the compression factor to decrease the file size in >>> trade off with quality. >>> >>> See >>> also http://www.gdal.org/frmt_gtiff.html and >>> http://www.gdal.org/gdaladdo.html for >>> details. >>> >>> I believe that modern QGIS versions have these options exposed in the >>> GUI, but probably not as default. >>> >>> So maybe there is room for potential to get a smaller size Geotiff. >>> >>> Greetings, >>> Andreas >>> >>> On 2016-09-22 09:32, Reginald Carlier wrote: >>> >>>> Thanks Andreas, >>>> >>>> >>>> >>>> Creating a Geotiff with pyramids did the trick. The only disadvantage >>>> is that it created a file of about 1.7 GB (the original was 90 MB). >>>> >>>> Now I am ready to test the app J. >>>> >>>> >>>> >>>> Regards, >>>> >>>> >>>> >>>> *Van:*Neumann, Andreas [mailto:[email protected] >>>> <mailto:[email protected]>] >>>> *Verzonden:* woensdag 21 september 2016 16:19 >>>> *Aan:* Reginald Carlier >>>> *Onderwerp:* Re: [Qgis-user] QField >>>> >>>> >>>> >>>> Hi Reginald, >>>> >>>> Did you create pyramids in the gpkg rasters? >>>> >>>> Generally, Geotiff should be well supported - definitely more tested >>>> than gpkg rasters. I had a 1GB geotiff on qfield (on SD-Card) and it >>>> displays fast. I haven't tested vrt files with geotiffs - if it works >>>> as well? >>>> >>>> Andreas >>>> >>>> On 2016-09-21 15:44, Reginald Carlier wrote: >>>> >>>> Hi Erwan, >>>> >>>> >>>> >>>> You can look in the list of last week where I posted a couple of >>>> questions about qfield and was pointed to the right website for >>>> documentation. >>>> >>>> I succeeded to publish a map on my phone but the aereal photo >>>> which was published as a gpkg file doesn't render. When I use the >>>> raster.gpkg on my desktop it renders but very slow. >>>> >>>> The gpkg file was created from a 90 MB jp2 file. >>>> >>>> >>>> >>>> Regards, >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Qgis-user mailing list >>>> [email protected] <mailto:[email protected]> >>>> <mailto:[email protected] <mailto:[email protected]>> >>>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user >>>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user >>>> >>>> >>>> >>>> >>>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Qgis-user mailing list >>> [email protected] <mailto:[email protected]> >>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user >>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user >>> > > > _______________________________________________ Qgis-user mailing list [email protected] List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
