I had this issue once also, I think the clipping method is the most reliable. If I recall the odd/invalid polygons depended on which scale of Natural Earth you use. Try downloading a different scale. I remember actually trying to fix the polygons and Russia was just too complicated to deal with at the time.
This is a common problem anytime you wrap the dateline with world data, and you might find more solutions using those search terms. Thanks, Alex On 8/21/19 11:10, Nicolas Cadieux wrote: > Good idea Calvin, > Anyone else with a simpler, faster solution? If not, I will try. > Nicolas > >> Le 21 août 2019 à 13:43, C Hamilton <adenacult...@gmail.com> a écrit : >> >> The way I more or less solved something like this was by pre-clipping the >> Natural Earth data at the boundaries of the projection and made two >> different vector layers You then will not get the wrap around. If need be >> you can shift the longitude of one of layers by 180 degrees and then attempt >> to merge the two pieces together. For countries that now have a cut line >> down the middle you can then merge the pieces together. It can be time >> consuming, but will work. I don't know if there is an easier way. >> >> Calvin >> >>> On Wed, Aug 21, 2019 at 1:17 PM Nicolas Cadieux >>> <nicolas.cadi...@archeotec.ca> wrote: >>> Hi, >>> >>> These are the nasty polygons. I am hoping you will see the image. >>> >>> <djfpggkfmkkepjkp.jpg> >>> >>>> On 2019-08-19 12:26 p.m., Nicolas Cadieux wrote: >>>> Hi, >>>> >>>> Trying to help another Qgis user that posted earlier. >>>> >>>> We have Natural Earth vectorial Data that we what to reproject in Equal >>>> Earth. We want Austria to be in the middle of the map so we created a >>>> Equal Earth Project using custom CRS using +proj=eqearth +datum=WGS84 >>>> +wktext +lon_0=136 with the help of >>>> https://proj.org/operations/projections/eqearth.html. Using lon_0=136 >>>> puts Australia in the middle and limits the distortion in that longitude. >>>> >>>> Data was reprojected and saved in the new projection (vector/Data >>>> Management tools/Reproject Layer). Project is also in the Equal Earth >>>> projection so no reprojection on the fly is happening behind the scenes. >>>> >>>> Question: How so we take care of the nasty polygons that appear when we >>>> add the "+lon_0=136" parameter? See the zip. >>>> >>>> You can find the data here: >>>> https://drive.google.com/open?id=1eL6ws8Jc-PugMM2gxV79j0k-TGoWcw6B >>>> >>>> Qgis 3.8.1 on Windows 10_64 >>>> >>>> Thanks >>>> >>>> Nicolas >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Qgis-user mailing list >>>> Qgis-user@lists.osgeo.org >>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> _______________________________________________ >>> Qgis-user mailing list >>> Qgis-user@lists.osgeo.org >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
