PolarStereographicGridDefinition.EnumerateGridPoints Not Implemented Exception - when reader.GetDatasetValues is called

[AquaNerd]

I am getting a not implemented exception while using the GetDatasetsValues. Mostly to test how complete the library is and what yet needs to be implemented to make it fully functional for my usecase. Are there plans to complete some of this work in the near future? And am I using it correctly? ReadMessages and ReadAllDatasets seems to do most of what I need but now wondering if those are iterating through all the data completely. I would like to help, but interested in your feedback.

[nmangue]

The way you read the data is ok. However there are many ways to encode data values in a grib file. It seems that the template used by your dataset is not yet supported

Could you provide the full stack trace and the value of DataSet.DataRepresentationSection.TemplateNumber ?
If possible, could you also share the file you are reading ?

[AquaNerd]

@nmangue thanks for getting back to me so quickly. Here is where I am pulling the grib2 files from. https://nomads.ncep.noaa.gov/pub/data/nccf/com/pcpanl/prod/

An example file out of those are https://nomads.ncep.noaa.gov/pub/data/nccf/com/pcpanl/prod/pcpanl.20220211/st4_conus.2022021114.01h.grb2

[AquaNerd]

@nmangue I am finding out that the original not implemented exception is due to the contents of the file include using the polarStereographicGridDefinition template which here is not yet implemented.

NGrib/src/NGrib/Grib2/Templates/GridDefinitions/0020_PolarStereographicProjectionGridDefinition.cs

Line 83 in cf1e780

public override IEnumerable<Coordinate> EnumerateGridPoints() => throw new NotImplementedException();

I assume that was put there as a placeholder for the point when you ran into a need to implement it. As in, you didn't have example data to use in order to set it up. Correct?

[nmangue]

That is correct !
Would you try to implement this functionality ? You can use the NetCDF Java implementation as a reference : Grib2Gds.java@983

[AquaNerd]

@nmangue in due time. But for my use case, I am limited on time. I guess I will keep an eye out if you or someone else beats me to it.

That is correct ! Would you try to implement this functionality ? You can use the NetCDF Java implementation as a reference : Grib2Gds.java@983

Also there is a bit more to it then just copy pasting into c# code. I have not dug into it far enough to determine what is comparable to the projection interface and AbstractProjection base class that is used for the stereographic projection.