WCST_Import netCDF regular axis's resolution is calculated internally

[Bang Pham Huu]

Current, in ingredient file of General Coverage, regular axes need to put the resolution which is needed to calculate by user, especially for netCdf, Grib which does not have the offset vector attribute.

It could be changed to calculate the resolution for regular axis by min and max internally.
e.g:

                        "Long": {
                            "min": "${netcdf:variable:lon:min}",
                            "max": "${netcdf:variable:lon:max}",
                        "resolution": "${netcdf:variable:lon:resolution}",
                            "gridOrder": 2
                        },

and the resolution be calculated from the geo bound: min, max and totalnumber of grid pixels internally by the average of the distance between all geo coordinates (e.g: point0 - point1, point1 - point2,….pointn).

For GDAL recipe and Gribb, they already had the supporting variables to extract from the file natively

GDAL: "resolution": "${gdal:resolutionX}"
GRIB: "resolution": "-${grib:jDirectionIncrementInDegrees}"

Use case: don't need to update the ingredient file (ideally) for most cases and have to calculate the resolution.

[Bang Pham Huu]

actually, the resolution must need to be specified and bound to a dimension of file, so the ingredient should be

                        "Long": {
                            "min": "${netcdf:variable:lon:min}",
                            "max": "${netcdf:variable:lon:max}",
                            "gridOrder": 2,
                            "resolution": "${netcdf:variable:lon:resolution}"
                        }

[Dimitar Misev]

why?

[Bang Pham Huu]

Replying to dmisev:

why?

because you don't know "Long" axis here is bound to any dimension.

[Dimitar Misev]

So binding is done by netcdf:variable:lon? Ok.

[Bang Pham Huu]

Replying to dmisev:

So binding is done by netcdf:variable:lon? Ok.

what do you mean? it is best to let the evaluator evaluate the expression and it needs to know what dimension is used.

[Dimitar Misev]

Perhaps this is a better design:

"Long": {
    "dimension": "${netcdf:variable:lon}",
    "min": "${min}",
    "max": "100.5",
    "gridOrder": 2
}

But anyway, let's not complicate by simplifying.