GRIB loading
I attempted to create some helper functions to load GRIB files with Start(). It can load one GRIB file with some restrictions:
- regular grid data (gridType: regular_ll)
- Global region
- selected time step
- no member dim, only [latitude, longitude, time]
Here are the files: https://earth.bsc.es/gitlab/aho/aho-testtest/-/tree/master/startR/GRIB
In the testing script, the first two cannot work now due to missing files. I found one file (the 3rd case) that Start() can successfully load.
Many remaining things to be solved, e.g., correct metadata, flexible dimensions, transform, load a region instead of global data.
The helper function uses "gribr" package. It's better to not have this dependency.