On Wed, Aug 8, 2012 at 10:39 PM, Andrea Aime <[email protected]> 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&REQUEST=GetCoverage&FORMAT=image/tiff&IDENTIFIER=Img_Sample&BOUNDINGBOX=21.5843815789473652,-129.8681617142856908,53.2349184210526332,-62.9889182857142913,urn:ogc:def:crs:EPSG::4326&GRIDBASECRS=urn:ogc:def:crs:EPSG::4326&GRIDORIGIN=53.2349184210526332,-129.8681617142856908&GRIDCS=urn: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
