[gdal-dev] [ogr2ogr] Anti-meridian issue when reprojecting from a Polar Stereographic projection to a geographic CRS

[Andrey VI]

Unfortunately, the result is still incorrect.
The empty areas are still here around 88-89°N and some polygons are still broken (for example at -67°W, 76°N):
Example .
These polygons turned out to be hidden under others, although in the original data all polygons are adjacent but not overlapping. Not sure if this is a result of reported errors or a separate issue.  
>Tuesday, October 14, 2025 4:48 PM +03:00 from Rahkonen Jukka < jukka.rahkonen at maanmittauslaitos.fi >:
> 
>Hi,
>
>This command prints also 6 error lines, but at least the result does not have empty areas:
>
>ogr2ogr -t_srs epsg:4626 -wrapdateline -datelineoffset 180 foo3.shp polys.shp
>
>I do not know if the result is correct or not, just that it is different.
>
>-Jukka Rahkonen-
>
>
>________________________________________
>Lähettäjä: gdal-dev < gdal-dev-bounces at lists.osgeo.org > käyttäjän Andrey VI via gdal-dev < gdal-dev at lists.osgeo.org > puolesta
>Lähetetty: Tiistai 14. lokakuuta 2025 15.50
>Vastaanottaja:  gdal-dev at lists.osgeo.org < gdal-dev at lists.osgeo.org >
>Aihe: [gdal-dev] [ogr2ogr] Anti-meridian issue when reprojecting from a Polar Stereographic projection to a geographic CRS
>
>Hello. I can't reproject data from a Polar Stereographic projection (EPSG:3996) to a geographic projection (EPSG:4326) correctly using ogr2ogr. Command:ogr2ogr -t_srs EPSG:4326 -wrapdateline polys_4326.shp polys.shpERROR 1: IllegalArgumentException: Points of LinearRing do not form a closed linestring
>ERROR 1: IllegalArgumentException: Points of LinearRing do not form a closed linestring
>ERROR 1: IllegalArgumentException: Points of LinearRing do not form a closed linestring
>ERROR 1: IllegalArgumentException: Points of LinearRing do not form a closed linestring
>ERROR 1: IllegalArgumentException: Points of LinearRing do not form a closed linestring
>ERROR 1: IllegalArgumentException: Points of LinearRing do not form a closed linestring As a result some polygons are broken and also some polygons appears with artifacts.[X]The data used and the result (58 MB):  https://drive.google.com/file/d/176jtROjjeTlAQTITAJ75tBT1GwiUzSUm/view?usp=sharing . How to reproject from a projection naturally crossing the anti-meridian to a geographic CRS without any errors using ogr2ogr?--Andrey
--
Andrey VI
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