Hi,
I'm trying to get the GDAL WCS client working and in the process trying
different WCS servers.
I just found this http://nsidc.org/cgi-bin/atlas_north and I'm trying to
use its WCS
I'm making WCS 1.0 and 1.1 GetCoverage calls on a dataset that seems to
be natively served in EPSG:32661:
http://nsidc.org/cgi-bin/atlas_north?SERVICE=WCS&REQUEST=GetCoverage&VERSION=1.0.0&COVERAGE=sea_ice_concentration_01&FORMAT=GeoTIFF&BBOX=-3961770.085,4312961.971,-3911770.085,4362961.971&WIDTH=2&HEIGHT=2&CRS=EPSG:32661
Error: Requested BBOX
(-5336721.37969822,2086027.77164232,-5316625.78536214,2109378.29356774)
is outside requested coverage BBOX
(-3961770.085,-3961769.906,3961769.894,4362961.971)
http://nsidc.org/cgi-bin/atlas_north?SERVICE=WCS&VERSION=1.1.1&REQUEST=GetCoverage&IDENTIFIER=sea_ice_concentration_01&FORMAT=image%2Ftiff&BOUNDINGBOX=-3924270.085,4350461.971,-3949270.085,4325461.971,urn:ogc:def:crs:EPSG::32661&RangeSubset=pixels&WIDTH=2&HEIGHT=2&GridBaseCRS=urn:ogc:def:crs:EPSG::32661&GridCS=urn:ogc:def:cs:OGC:0.0:Grid2dSquareCS&GridType=urn:ogc:def:method:WCS:1.1:2dGridIn2dCrs&GridOrigin=-3949270.085,4350461.971&GridOffsets=25000,25000
Requested BBOX
(-5335202.686558,2107853.71031472,-5335202.686558,2107853.71031472) is
outside requested coverage BBOX
(-3961770.085,-3961769.906,3961769.894,4362961.971)
For the first one I'm making a fix on the GDAL side for the grid origin
not being at the center of a pixel and for the second one I'm setting
the offsets to positive values and leaving out the 0,0 in the middle.
For the 2nd one I'm also making axis order inversion since EPSG::32661
is N,E. That's why the GridOrigin in like it is. I'm not sure whether
MapServer applies axis inversion in the 1.1 in this case.
Anyway, the baffling thing is that MapServer reports in both cases the
requested BBOX (the one I'm sending, I guess) to be outside coverage
BBOX and changed from what I sent -- there is obviously a reprojection
done. The values are strange and I can't find/think in what CRS they are.
Any ideas?
Thanks,
Ari
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