[OSGeo-Discuss] WCS/WMS accuracy tests?

[Simone Giannecchini]

Hi there,
any feedback on this from the gdal/mapserver folks?
Anyone looked into my findings?

Simone.
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Ing. Simone Giannecchini
GeoSolutions S.A.S.
Founder - Software Engineer
Via Carignoni 51
55041  Camaiore (LU)
Italy

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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
>>
>>
>
> --
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