WCS 2.0.1 GetCoverage requests which are utilizing the Scaling extension require that axis which are used for scaling are defined with URI.
The more user-friendly way, which seems to be also correct by the standard, would be to accept the same axis labels which are announced in DescribeCoverage of the corresponding coverage. For the above case DescribeCoverage
returns grid labels "axisLabels>i j<" and the native CRS labels as "axisLabels="E N""
The SCALESIZE parameter in the example would therefore be simply
Geoserver-devel mailing list discussion http://osgeo-org.1560.x6.nabble.com/WCS-2-0-1-with-SCALESIZE-tc5313470.html
WCS 2.0.1 Scaling extension standard http://portal.opengeospatial.org/files/?artifact_id=54504
Rasdaman-users mailing list discussion https://groups.google.com/forum/#!msg/rasdaman-users/SBA2SrVapHo/J8POkUVy-iwJ