THE SMART TRICK OF GBX9 THAT NOBODY IS DISCUSSING

A featureCollection should have a name, a featureType and also a route (never set an ID attribute). Note the featureType attribute ought to now equivalent GRIB1 or GRIB2, not basic GRIB. It will likely be quite small (a couple of dozen KBytes to some MBytes for a considerable selection), and as soon as established, will make accessing the GRIB sel