On Thu, Aug 9, 2012 at 10:28 AM, Rahkonen Jukka > In your example I wonder if the northing component of the GridOffsets should > be negative because your GridOrigin is set into the top-left corner.
You are right. Unfortunately, it must not be negative with GeoServer and EPSG:4326 otherwise it gives mirrored output (rotated+mirrored) Radim > -Jukka Rahkonen- > > Radim Blazek wrote: > >> On Wed, Aug 8, 2012 at 10:39 PM, Andrea Aime <andrea.aime@geo- >> solutions.it> wrote: >> > On Wed, Aug 8, 2012 at 9:47 PM, Radim Blazek <[email protected]> >> wrote: >> >> >> >> Hi, >> >> I cannot get correct response from WCS 1.1.1, the result is rotated. >> >> The server is here: >> >> >> >> http://www.sogeo.ch/geoserver/wcs >> >> >> >> request: >> >> >> >> >> >> >> http://www.sogeo.ch:80/geoserver/wcs?SERVICE=WCS&VERSION=1.1.1&RE >> QUES >> >> >> T=GetCoverage&FORMAT=image/tiff&IDENTIFIER=Img_Sample&BOUNDIN >> GBOX=21. >> >> 5843815789473652,-129.8681617142856908,53.2349184210526332,- >> 62.988918 >> >> >> 2857142913,urn:ogc:def:crs:EPSG::4326&GRIDBASECRS=urn:ogc:def:crs:EPS >> >> G::4326&GRIDORIGIN=53.2349184210526332,- >> 129.8681617142856908&GRIDCS=u >> >> >> rn:ogc:def:cs:OGC:0.0:Grid2dSquareCS&GRIDTYPE=urn:ogc:def:method:WCS >> : >> >> >> 1.1:2dSimpleGrid&GRIDOFFSETS=1.7583631578947370,1.9670365714285709 >> >> >> >> returns rotated raster. I have checked all params and I believe that >> >> with GRIDTYPE=urn:ogc:def:method:WCS:1.1:2dSimpleGrid it should >> never >> >> be rotated. >> > >> > >> > Hi Radim, long time no see. >> > The WCS spec uses the urn: form, urn:ogc:def:crs:EPSG::4326, that >> > mandates the data to be expressed in lat/lon order, GeoServer respects >> > that to the letter. >> >> Yes, the request above has lat/lon order in BOUNDINGBOX, GRIDORIGIN and >> GRIDOFFSETS (North America), that is not a problem. >> >> > However you are right, the spec says no rotation allowed: >> > >> > GridType: default is "urn:ogc:def:method:WCS:1.1:2dSimpleGrid" >> > (This GridType disallows rotation or skew relative to the GridBaseCRS >> > - therefore GridOffsets has only two numbers.) >> > >> > Now... is it possible to maintain lat/lon axis order and still use >> > 2dSimpleGrid? >> >> Why not? Anyway, can you find in GeoServer code the place where the >> output is rotated with params given above? >> >> >> Does somebody has any idea? Are the params wrong? Which free WCS >> >> client is known to work with GeoServer WCS 1.1.1? >> > >> > The was no released WCS client to use at the time, GeoServer is the >> > reference implementation, it was tested as such, nobody from OGC >> > complained. >> > However I believe Frank tried out GDAL against GeoServer too in that >> > time, can't remember outstanding issues there either. >> >> GDAL does not work with WCS 1.1 in geographic CRS because it does not >> switch axis order. >> >> >> The result with 1.1.1 is also larger by 1 pixel in each direction >> >> (1.0.0 works OK), is it taken into account that 1.1.1 grid is using >> >> cell centers, not edges? >> > >> > OGC mandates cell centers as the one and only way to deal with raster >> > data as far as I know, I believe we should be using it on both WCS >> > versions but I'm not sure, they were implemented by two different >> > people and the code paths are quite different. >> >> AFAIK, the WCS version 1.0 should use cell edges (bbox) like WMS 1.x does. >> >> Radim >> >> > Cheers >> > Andrea >> > >> > -- >> > == >> > Our support, Your Success! Visit http://opensdi.geo-solutions.it for >> > more information. >> > == >> > >> > Ing. Andrea Aime >> > @geowolf >> > Technical Lead >> > >> > GeoSolutions S.A.S. >> > Via Poggio alle Viti 1187 >> > 55054 Massarosa (LU) >> > Italy >> > phone: +39 0584 962313 >> > fax: +39 0584 962313 >> > mob: +39 339 8844549 >> > >> > http://www.geo-solutions.it >> > http://twitter.com/geosolutions_it >> > >> > ------------------------------------------------------- >> > >> >> ------------------------------------------------------------------------------ >> Live Security Virtual Conference >> Exclusive live event will cover all the ways today's security and threat >> landscape has changed and how IT managers can respond. Discussions will >> include endpoint security, mobile security and the latest in malware threats. >> http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ >> _______________________________________________ >> Geoserver-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/geoserver-users > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. 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