On Thu, 22 Oct 2020 at 10:23, Nyall Dawson <[email protected]> wrote: > > On Thu, 22 Oct 2020 at 10:15, <[email protected]> wrote: > > > > Nyall, > > > > Thanks for your quick reply. Would I load it first and then save the layer > > as a geopackage to do that? Or do I have to do something more elaborate? > > I'd do it from the QGIS browser panel -- right click on the geojson > file and save as.
Just to clarify -- that's the "export" option, not "save as". Nyall That'll save some of the initial time required to > load this into QGIS. > > (alternatively the fastest way to convert would be to use ogr2ogr > directly from the command line, if you're comfortable with that!) > > Nyall > > > > > Cheers > > > > Dr Iain Stuart > > JCIS Consultants > > P.O. Box 2397 > > Burwood North > > NSW, 2134 > > > > (02) 9701 0191 > > (0413) 380116 (m) > > > > -----Original Message----- > > From: Nyall Dawson <[email protected]> > > Sent: Thursday, 22 October 2020 10:41 AM > > To: [email protected] > > Cc: qgis-user <[email protected]> > > Subject: Re: [Qgis-user] clip geojason QGIS > > > > On Thu, 22 Oct 2020 at 09:33, <[email protected]> wrote: > > > > > > It seems that Microsoft (of all people) is creating this database of > > > building shapes for the known universe. They recently completed Australia > > > and made it available. It is in a zipped geojason file – a format that I > > > have no idea about. > > > > > > > > > > > > I have loaded it to QGIS and it is huge. It took over 30min to load and > > > it takes about 10min to redraw every time and I am not running it on a > > > Pentium 4 with 8bits of ram either. > > > > Convert it to a geopackage first -- geojson is a HORRIBLE format for large > > datasets like this, as it's completely unoptimised and has no spatial > > index. Effectively on every redraw QGIS is having to loop through the > > entire 6gb geojson file every time! ouch.... > > > > Nyall > > > > > > > > > > > > > > > > > > I would like to clip the data to the states of Australia which I have a > > > vector files or maybe regions in order to get the dataset smaller so it > > > can be more usable. > > > > > > > > > > > > Can you clip geojason files ? or would I have to covert them into > > > something like shapefiles? Any ideas on a workflow to do this? > > > > > > > > > > > > BTW I am running an I7-8700 with 16mb RAM and a NVIDIA Quadro P2000. > > > > > > > > > > > > Cheers > > > > > > > > > > > > Dr Iain Stuart > > > > > > JCIS Consultants > > > > > > P.O. Box 2397 > > > > > > Burwood North > > > > > > NSW, 2134 > > > > > > > > > > > > (02) 9701 0191 > > > (0413) 380116 (m) > > > > > > > > > > > > _______________________________________________ > > > Qgis-user mailing list > > > [email protected] > > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > > _______________________________________________ Qgis-user mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
