[gdal-dev] Re: Ogr2ogr -flip_coordinates

Even Rouault even.rouault at mines-paris.org
Thu Nov 3 16:28:54 EDT 2011

> I already thought that I could get a valid shapefile with ogr2ogr by
> replacing EPSG:3067 with EPSG:3047 everywhere in the XML document.
> However, ogr2ogr was creating a similar flipped shapefile. Is this a gdal
> bug?  EPSG:3047 is definitely Northing-Easting

The EPSG:XXXX notation is ambiguous : we don't know if it means that the EPSG 
axis convention must be applied or not, because it was the notation that was 
used before OGC "clarifications" on EPSG axis ordering.

To have unambiguous SRS naming, use rather urn:ogc:def:crs:EPSG::3047 which 
really means "use EPSG axis ordering" . Unfortunately I think it won't work 
with the OGR GML driver because the EPSGTreatsAsLatLong() method in OSR is 
only desinged to work with geographic SRS, and not projected ones :-( Would be 
worth filing a ticket I guess

> -Jukka-
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