[gdal-dev] Problem with Shapefile and CRS 2056/21781

[Even Rouault]

Le dimanche 24 avril 2016 17:29:36, Stefan Keller a écrit :
> Given a Shapefile "swiss_admin_boundaries.shp" in EPSG:2056 (or 21781,
> to be downloaded for free at [1]) I have problems transforming it to
> any other SRS/CRS.

Could you post the .prj file ?

> 
> When doing this:
> > ogr2ogr -f "GPKG" swiss_admin_boundaries1.gpkg swiss_admin_boundaries.shp
> > -t_srs EPSG:3857
> 
> ... swiss_admin_boundaries2.gpkg have a shift of about 150m.
> 
> But when I convert Shapefile first e.g. to GeoPackage, and transform then:
> > ogr2ogr -f "GPKG" tmp.gpkg swiss_admin_boundaries.shp
> > ogr2ogr -f "GPKG" swiss_admin_boundaries2.gpkg tmp.gpkg -t_srs EPSG:3857
> > del tmp.gpkg
> 
> ... swiss_admin_boundaries2.gpkg is correct!
> 
> What could be the reason?
> 
> :Stefan
> 
> [1] https://opendata.swiss/en/dataset/swissboundaries3d-gemeindegrenzen
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