Thank you very much Matthias, that fixed it. Updated my Gist accordingly here: https://gist.github.com/timlinux/1057c2c6b5ebda6ed2b5aa8c5aa21372
Regards Tim On Tue, Nov 17, 2020 at 7:57 AM Matthias Kuhn <[email protected]> wrote: > Hi Tim, > > Does it help if you directly call `mapCanvas.setDestinationCrs()` instead > of setting the crs on `mapSettings()`? > > The returned mapSettings object is not meant to be modified. > > Matthias > > > On Tue, Nov 17, 2020 at 12:58 AM Tim Sutton <[email protected]> wrote: > >> Hi Folks >> >> I am trying to update a 2.x snippet I have which iteratively sets the CRS >> with sequentially higher LO values: >> >> https://gist.github.com/timlinux/1057c2c6b5ebda6ed2b5aa8c5aa21372 >> >> # Uses a trick from Alexander Neto: "I created a orthographic projection >> with lisbon longitude, but with a south hemisphere latitude >> # That way kinda looks 3d" >> # This will make the QGIS use a world projection and then move the center >> # of the CRS sequentially to create a spinning globe effect >> import time >> from subprocess import call >> longitude_increments = 5 >> image_counter = 1 >> for i in range(-180, 180, longitude_increments): >> definition = ( >> '+proj=ortho +lat_0=-20 +lon_0=%i +x_0=0 +y_0=0 +R=6371000 +units=m >> +no_defs +type=crs' % i) >> crs = QgsCoordinateReferenceSystem() >> crs.createFromProj(definition) >> iface.mapCanvas().mapSettings().setDestinationCrs(crs) >> #iface.mapCanvas().setMapUnits(0) >> iface.mapCanvas().refresh() >> iface.mapCanvas().saveAsImage( >> '/tmp/globe-%03d.png' % image_counter) >> image_counter += 1 >> print (definition) >> time.sleep(1) >> # Now generate the GIF. If this fails try run the call from the command >> line >> # and check the path to convert (provided by ImageMagick) is correct... >> call('/usr/bin/convert -delay 35 -loop 0 /tmp/globe-*.png /tmp/globe.gif') >> >> The example python above using Orthographc North will hopefully make a >> more pleasing looking spinny globe. However, in QGIS 3.x the code runs >> but if I inspect the mapcanvas CRS after setting the new CRS, it still >> shows the old CRS. Can anyone see what I am missing here? >> >> Thanks! >> >> Regards >> >> Tim >> >> -- >> >> ------------------------------------------------------------------------------------------ >> >> Tim Sutton >> Visit http://kartoza.com to find out about open source: >> * Desktop GIS programming services >> * Geospatial web development >> * GIS Training >> * Consulting Services >> Tim is a member of the QGIS Project Steering Committee >> >> ------------------------------------------------------------------------------------------- >> _______________________________________________ >> QGIS-Developer mailing list >> [email protected] >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > -- ------------------------------------------------------------------------------------------ Tim Sutton Visit http://kartoza.com to find out about open source: * Desktop GIS programming services * Geospatial web development * GIS Training * Consulting Services Tim is a member of the QGIS Project Steering Committee -------------------------------------------------------------------------------------------
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