[Qgis-user] problems reprojecting in equal earth

[Nicolas Cadieux]

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 <adenaculture at 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.cadieux at 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 
>>> 
>>> 
>>> 
>>> 
>>> 
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