[OSGeo-Discuss] WCS/WMS accuracy tests?

[Simone Giannecchini]

I think the goal of this entire email exchange was to try and
understand a bit better where this problem was coming from.
I gave my contribution on the software I manage, I won't into
gdal/mapserver/qgis, I was hoping to get some feedback from their
communities.

Cheers,
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, Jan 28, 2010 at 12:22 AM, Pablo Carreira
<pablotcarreira at hotmail.com> wrote:
>
> 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
>> > > >
>> > > _______________________________________________
>> > > Discuss mailing list
>> > > Discuss at lists.osgeo.org
>> > > http://lists.osgeo.org/mailman/listinfo/discuss
>> >
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>>
>> --
>> Christopher Schmidt
>> Web Developer
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