[mapserver-users] What to do with WMS 1.3.0 and axis order of EPSG:2393?

[Yewondwossen Assefa]

Hi Jukka,

  Issues that you raise here are discussed in the following bugs (as a 
reference):
    http://trac.osgeo.org/mapserver/ticket/3582
  http://trac.osgeo.org/mapserver/ticket/3576

I think the idea of using ogr/gdal to reliably get the axis order is for 
may the best option. In that case when we use wms1.3.0 and up, wfs 1.1 
and up we always know that the axis order are the same regardless of the 
format in which the epsg is given.

regards,



On 24/11/2010 8:04 AM, Rahkonen Jukka wrote:
> Hi,
> The Finnish KKJ projection EPSG:2393 belongs to those with axis order 
> Northing-Easting
> http://www.epsg-registry.org/report.htm?type=selection&entity=urn:ogc:def:crs:EPSG::2393&reportDetail=short&style=urn:uuid:report-style:default-with-code&style_name=OGP%20Default%20With%20Code&title=EPSG:2393 
> <http://www.epsg-registry.org/report.htm?type=selection&entity=urn:ogc:def:crs:EPSG::2393&reportDetail=short&style=urn:uuid:report-style:default-with-code&style_name=OGP%20Default%20With%20Code&title=EPSG:2393>
> However, Mapserver WMS 1.3.0 from MS version 5.6.5 does not honour the 
> official axis order but it is assuming the Easting-Northing BBOX also 
> with WMS 1.3.0. Any suggestions about how to solve this?  In addition 
> to the two I have, to stay with WMS 1.1.1 or to start using UTM 
> projection with a real Easting-Northing axis order.
> Problem is not only with Mapserver, GDAL based clients like QGis are 
> creating WMS 1.3.0 request with Easting-Northing BBOX for EPSG:2393.  
> Good is that QGIS and Mapserver play nicely together with WMS 1.3.0.  
> Bad is that it is not a fair play because they  both are fooling with 
> the rules.
> I was wondering if this could be handled somehow in a similar way than 
> Geoserver and deegree are doing it.  They are following the 
> traditional Easting-Northing axis order if CRS is given as EPSG:2393.  
> But if CRS is given as
> urn:ogc:def:crs:EPSG::2393 they are using the axis order that is 
> defined in the EPSG database.  This is a little bit fiddling with the 
> standard, but the urn-format is the official one and the alternative 
> short format gives better possibilities for success for the end user 
> of ready made WMS/WFS clients.
> -Jukka Rahkonen-
>
>
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> mapserver-users at lists.osgeo.org
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Assefa Yewondwossen
Software Analyst

Email: yassefa at dmsolutions.ca
http://www.dmsolutions.ca/

Phone: (613) 565-5056 (ext 14)
Fax:   (613) 565-0925
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