[Qgis-user] Why QGIS change the SRS?

[jratike80]

Goyo wrote
> No, those are WKT and they include some data which is different (name
> and EPSG code). The proj4 strings are identical:
> 
> http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/proj4/
> http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/proj4/

The real difference between these projections is in the order of coordinate
axis and it can be queried from the EPSG database:

This one is Northing-Easting system
http://epsg-registry.org/export.htm?wkt=urn:ogc:def:crs:EPSG::3042

But this one is Easting-Northing system
http://epsg-registry.org/export.htm?wkt=urn:ogc:def:crs:EPSG::25830

Mixing those two may cause problems for example when data are exported into
GML format.

-Jukka Rahkonen-





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