[gdal-dev] WFS 1.1 and axis orientation - wrong coordinates
jachym.cepicky at gmail.com
Fri Feb 17 04:31:26 EST 2012
sorry for delay
I see the point and I managed to get proper output from the WFS using
--config GML_INVERT_AXIS_ORDER_IF_LAT_LONG YES --config
but, I did not find a way, how to pass those two options to MapServer
Mapfile - any hint there?
+axis (which should IMHO solve the problem too) did not help in the
P.S. I know, this should possibly go the mapserver mailing list, just
trying to continue the thread and hope, it will end successfully - thanks
On 9.2.2012 20:22, Even Rouault wrote:
> Le jeudi 09 février 2012 20:00:03, Jachym Cepicky a écrit :
>> I think, OGR (and therefore MapServer too), is not taking care about
>> axis orientation of incomming data, acting as WFS 1.1 client. Result is
>> flipped data and I do not know, how the software recognizes, that axes
>> order is different (apperently, it does not).
>> We have setuped generic WFS 1.1 server with MapServer (6.0.1). Data are
>> published in WGS84.
>> With very simple request, you get the data and the axis order is Y,X
>> (lat, lon) (imho correct)
>> Now, when try to get this data with OGR and convert them to e.g. Shapefile
>> ogr2ogr okresy.shp
>> Resulting shapefile has inverted coordinates (wrong)
> Jachym ,
> As always with axis ordering issues, the situation is complex. If not already
> done, I'd encourage you to first carefully read
> http://gdal.org/ogr/drv_gml.html , and particularly the CRS section.
> I've looked at your server output and I believe this is more a bug (well, this
> can be discussed) in MapServer than in OGR. The issue is that in its
> GetFeature output, MapServer indicates srsName="EPSG:4326" but reports
> coordinates in lat, long order.
> The GML driver assumes that SRS expressed in EPSG:XXXX form are in long, lat
> order (which was the convention used in WFS 1.0 where most servers didn't
> respect the EPSG advertized axis order). Whereas if they are expressed as
> urn:ogc:EPSG::XXXX (which is now the popular form for WFS 1.1), they are in
> the axis order expressed by EPSG, which is lat, long in the case of EPSG 4326.
> I had created http://trac.osgeo.org/mapserver/ticket/3576 about that some time
> When the GML driver recognizes that the coordinates of a SRS are in lat, long
> order in the GML, it will flip them by default so that the consuming
> application see them in the usual long, lat order. This can be overriden with
> the GML_INVERT_AXIS_ORDER_IF_LAT_LONG config option.
> Best regards,
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