[OSGeo-Discuss] WCS/WMS accuracy tests?

Wed Jan 27 15:22:10 PST 2010

BTW, The possibility of the problem is in 
Qgis and not the server has been contemplated in this investigation?

Pablo Torres Carreira

> Date: Wed, 27 Jan 2010 13:47:46 -0500
> From: crschmidt at crschmidt.net
> To: discuss at lists.osgeo.org
> Subject: Re: [OSGeo-Discuss] WCS/WMS accuracy tests?
> 
> On Wed, Jan 27, 2010 at 04:35:59PM -0200, Pablo Carreira wrote:
> > 
> > Hi Simone,
> > The issue 
> > http://jira.codehaus.org/browse/GEOS-3702217is not avaliable.
> 
> http://jira.codehaus.org/browse/GEOS-3702
> 
> > 
> > Pablo Torres Carreira
> > 
> > 
> > 
> > 
> > > Date: Wed, 27 Jan 2010 18:39:51 +0100
> > > Subject: Re: [OSGeo-Discuss] WCS/WMS accuracy tests?
> > > From: simone.giannecchini at geo-solutions.it
> > > To: discuss at lists.osgeo.org
> > > 
> > > Hi there,
> > > any feedback on this from the gdal/mapserver folks?
> > > Anyone looked into my findings?
> > > 
> > > Simone.
> > > -------------------------------------------------------
> > > Ing. Simone Giannecchini
> > > GeoSolutions S.A.S.
> > > Founder - Software Engineer
> > > Via Carignoni 51
> > > 55041  Camaiore (LU)
> > > Italy
> > > 
> > > phone: +39 0584983027
> > > fax:      +39 0584983027
> > > mob:    +39 333 8128928
> > > 
> > > 
> > > http://www.geo-solutions.it
> > > http://geo-solutions.blogspot.com/
> > > http://www.linkedin.com/in/simonegiannecchini
> > > http://twitter.com/simogeo
> > > 
> > > -------------------------------------------------------
> > > 
> > > 
> > > 
> > > On Thu, Dec 10, 2009 at 11:45 PM, Simone Giannecchini
> > > <simone.giannecchini at geo-solutions.it> wrote:
> > > >
> > > > Dear All,
> > > > I have spent some time investigating this isue with GeoServer trunk.
> > > >
> > > > Here:
> > > >
> > > > http://jira.codehaus.org/browse/GEOS-3702217
> > > >
> > > > you can find a quick detailed report. I am particularly interested in FrankW
> > > > feedback.
> > > >
> > > >
> > > > Ciao,
> > > > Simone
> > > >
> > > > Steven M. Ottens wrote:
> > > >>
> > > >>
> > > >> On Dec 7, 2009, at 5:47 PM, Stephen Woodbridge wrote:
> > > >>
> > > >>> Steven M. Ottens wrote:
> > > >>>>
> > > >>>> I know there have been speed tests between different WMS services,
> > > >>>> but I'm wondering has there been any data-quality/accuracy test been
> > > >>>> done between WMS and/or WCS services?
> > > >>>
> > > >>> I wonder if this is the difference between pixel as a point versus pixel
> > > >>> as an area. Mapserver uses gdal to handle GeoTiff files and Frank has put
> > > >>> a lot of effort in Gdal to handle this correctly.
> > > >>>
> > > >> That's our feeling as well. Andrea mentioned that there's an issue with
> > > >> different interpretations on the location of a pixel (centre vs.
> > > >> top-left).
> > > >>
> > > >>> Also, I'm surprised that there is any shift in mapserver because I do not
> > > >>> think mapserver reprojects data if the in and out projections are the
> > > >>> same. I can speak for the other services as I don't know how they work.
> > > >>
> > > >> I'll be doing more detailed tests tomorrow and will post an overview then
> > > >> with the exact versions and configurations and results if people want to
> > > >> reproduce them. I f people have suggestions for specific tests or
> > > >> configurations I'm happy to apply those if possible.
> > > >>
> > > >> Going to test with the latest Geoserver nightly, Mapserver 5.6.0-rc1,
> > > >> Deegree 2.3 rc1 on a windows 2003 machine. With two different GeoTIFFs
> > > >> (one in epsg:4326 and one in epsg:3035)
> > > >>
> > > >> Steven_______________________________________________
> > > >> Discuss mailing list
> > > >> Discuss at lists.osgeo.org
> > > >> http://lists.osgeo.org/mailman/listinfo/discuss
> > > >>
> > > >>
> > > >
> > > > --
> > > > View this message in context: http://n2.nabble.com/WCS-WMS-accuracy-tests-tp4127002p4148407.html
> > > > Sent from the OSGeo Discuss mailing list archive at Nabble.com.
> > > > _______________________________________________
> > > > Discuss mailing list
> > > > Discuss at lists.osgeo.org
> > > > http://lists.osgeo.org/mailman/listinfo/discuss
> > > >
> > > _______________________________________________
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> >  		 	   		  
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> 
> -- 
> Christopher Schmidt
> Web Developer
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