Petascope - netCDF irregular axis with upper -> lower coefficients order

[Bang Pham Huu]

For example, a netCDF file has a dimension plev with upper → lower coefficients.

plev = 100000, 97500, 95000, 85000, 70000, 50000 ;

and the ingredients for this variable are:

            "pressure_level": {
              "min": "${netcdf:variable:plev:min}",
              "max": "${netcdf:variable:plev:max}",
              "irregular": true,
              "directPositions": "${netcdf:variable:plev}",
              "resolution": "1",
              "gridOrder": 3
            },

The full ingredients from ​http://rasdaman.org/ticket/2415.

Petascope needs to return this upper → lower coefficients when encoding in netCDF for prev variable and corresponding values:

slice(100000) should be value of grid(0)
slice(50000) should be value of grid(5)