Hi,
I found that DescribeCoverage is also defining gml:coverageFunction
<gml:sequenceRule axisOrder=“+2 +1”>Linear</gml:sequenceRule>
gml:startPoint0 0</gml:startPoint>
</gml:GridFunction>
</gml:coverageFunction>
I do not understand the meaning of “+2 +1” here. Does it mean that for that coverage the second number of the coordinate pair should be picked before the first one? In that case the nurc__Pk50095 (EPSG:32633) would be OK and lead to Easting-Northing. The same axisOrder=“+2 +1” is used also for nurc_mosaic (EPSG:4326) and that would lead to Long-Lat. Is that the correct end result?
-Jukka Rahkonen-
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Lähettäjä: Rahkonen Jukka (MML) [mailto:jukka.rahkonen@anonymised.com]
Lähetetty: 6. elokuuta 2015 13:18
Vastaanottaja: Geoserver-users@lists.sourceforge.net
Aihe: [Geoserver-users] BoundingBox axis troubles with WCS 2.0.1
Hi,
I am not sure if I understand it right but I feel that some bounding boxes in the WCS 2.0.1 GetCapabilities and DescribeCoverage are wrong. They are optional in the CoverageSummary but Geoserver delivers them.
This is about nurc__mosaic coverage from GetCapabilities
wcs:CoverageIdnurc__mosaic</wcs:CoverageId>
wcs:CoverageSubtypeRectifiedGridCoverage</wcs:CoverageSubtype>
ows:LowerCorner6.346 36.492</ows:LowerCorner>
ows:UpperCorner20.83 46.591</ows:UpperCorner>
</ows:WGS84BoundingBox>
<ows:BoundingBox crs=“http://www.opengis.net/def/crs/EPSG/0/EPSG:4326”>
ows:LowerCorner6.346 36.492</ows:LowerCorner>
ows:UpperCorner20.83 46.591</ows:UpperCorner>
</ows:BoundingBox>
</wcs:CoverageSummary>
The WCS 2.0.1 Core standard defines WGS84BoundingBox and BoundingBox this way:
wgs84-BoundingBox: Minimum bounding rectangle surrounding dataset,
using WGS 84 CRS with decimal degrees and longitude before latitude
boundingBox: Minimum bounding rectangle surrounding dataset, in available CRS
Thus in the nurc__mosaic case the WGS84BoundingBox is correct but BoundingBox should have axis flipped to suit with http://www.opengis.net/def/crs/EPSG/0/EPSG:4326
ows:LowerCorner36.492 6.346</ows:LowerCorner>
ows:UpperCorner46.591 20.83</ows:UpperCorner>
CoverageSummary has both bounding boxes right for the nurc__Pk50095 coverage which is in EPSG:32633. However, in DescribeCoverage the axis order is different and for my mind wrong:
GetCapabilities:
<ows:BoundingBox crs=“http://www.opengis.net/def/crs/EPSG/0/EPSG:32633”>
ows:LowerCorner347649.93086859107 5176214.082539256</ows:LowerCorner>
ows:UpperCorner370725.976428591 5196961.352859256</ows:UpperCorner>
</ows:BoundingBox>
DescribeCoverage:
<gml:Envelope srsName=“http://www.opengis.net/def/crs/EPSG/0/32633” axisLabels=“E N” uomLabels=“m m” srsDimension=“2”>
gml:lowerCorner5176214.082539256 347649.93086859107</gml:lowerCorner>
gml:upperCorner5196961.352859256 370725.976428591</gml:upperCorner>
</gml:Envelope>
</gml:boundedBy>
-Jukka Rahkonen-