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<p>Hi Matthias,</p>
<p>Oh - thanks for the hint. So probably Reginald is just missing the pyramids in the geopackage - to be created, f.e. with gdaladdo.</p>
<p>Andreas</p>
<p>On 2016-09-22 09:56, Matthias Kuhn wrote:</p>
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<div class="pre" style="margin: 0; padding: 0; font-family: monospace">QField does not (yet) support tiff with jpeg compression.<br /><br /> See:<br /><a href="http://www.qfield.org/docs/project-management/dataformat.html#raster-data">http://www.qfield.org/docs/project-management/dataformat.html#raster-data</a><br /><br /> GeoPackage worked quite nice in our experience and can also be built in different resolutions (same page further down).<br /><br /> Matthias<br /><br /><br /> On 09/22/2016 09:37 AM, Neumann, Andreas wrote:
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0">Hi Reginald,<br /><br /> You can use the JPEG compression inside Geotiff. Note that this can be<br /> specified separately for both the full resolution and the pyramids. You<br /> can also select the compression factor to decrease the file size in<br /> trade off with quality.<br /><br /> See<br /> also <a href="http://www.gdal.org/frmt_gtiff.html">http://www.gdal.org/frmt_gtiff.html</a> and <a href="http://www.gdal.org/gdaladdo.html">http://www.gdal.org/gdaladdo.html</a> for<br /> details.<br /><br /> I believe that modern QGIS versions have these options exposed in the<br /> GUI, but probably not as default.<br /><br /> So maybe there is room for potential to get a smaller size Geotiff.<br /><br /> Greetings,<br /> Andreas<br /><br /> On 2016-09-22 09:32, Reginald Carlier wrote:<br /><br />
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0">Thanks Andreas,<br /><br /> <br /><br /> Creating a Geotiff with pyramids did the trick. The only disadvantage<br /> is that it created a file of about 1.7 GB (the original was 90 MB).<br /><br /> Now I am ready to test the app J.<br /><br /> <br /><br /> Regards,<br /><br /> <br /><br /> *Van:*Neumann, Andreas [mailto:<a href="mailto:a.neumann@carto.net">a.neumann@carto.net</a>]<br /> *Verzonden:* woensdag 21 september 2016 16:19<br /> *Aan:* Reginald Carlier<br /> *Onderwerp:* Re: [Qgis-user] QField<br /><br /> <br /><br /> Hi Reginald,<br /><br /> Did you create pyramids in the gpkg rasters?<br /><br /> Generally, Geotiff should be well supported - definitely more tested<br /> than gpkg rasters. I had a 1GB geotiff on qfield (on SD-Card) and it<br /> displays fast. I haven't tested vrt files with geotiffs - if it works<br /> as well?<br /><br /> Andreas<br /><br /> On 2016-09-21 15:44, Reginald Carlier wrote:<br /><br /> Hi Erwan,<br /><br /> <br /><br /> You can look in the list of last week where I posted a couple of<br /> questions about qfield and was pointed to the right website for<br /> documentation.<br /><br /> I succeeded to publish a map on my phone but the aereal photo<br /> which was published as a gpkg file doesn't render. When I use the<br /> raster.gpkg on my desktop it renders but very slow.<br /><br /> The gpkg file was created from a 90 MB jp2 file.<br /><br /> <br /><br /> Regards,<br /><br /> <br /><br /> <br /><br /> <br /><br /> _______________________________________________<br /> Qgis-user mailing list<br /> <a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a> <mailto:<a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a>><br /> List info: <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br /> Unsubscribe: <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br /><br /> <br /><br /> <br /><br /></blockquote>
<br /><br /> <br /><br /><br /> _______________________________________________<br /> Qgis-user mailing list<br /><a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><br /> List info: <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br /> Unsubscribe: <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br /><br /></blockquote>
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