Mishandling Grib Data Values

[eflowbeach]

It appears that the grib decoder is failing on these grib2 type of files (attached). Everything appears normal when adding the layer except the data range is -3 to -3. It should be a fairly broad range for this file like -3 to 700. The histogram also reports a singular spike at -3. I hope that helps! This would be a very useful feature to have working.

MRMS_RadarOnly_QPE_72H.latest.grib2.gz

[PeterPetrik]

• if loaded as raster (GDAL) it shows range -3 to 211.
• if checked with mdalinfo it shows correct -3 to 775.2

  \peter@pp-mb:~/Projects/qgis3/build-MDAL/tools$ ./mdalinfo ~/Downloads/MRMS_RadarOnly_QPE_72H.latest.grib2 --stats
  mdalinfo 0.8.0
  Mesh File: /Users/peter/Downloads/MRMS_RadarOnly_QPE_72H.latest.grib2
  Mesh loaded: OK
  Driver: GRIB
  Vertex count: 24500000
  Edge count: 0
  Face count: 24489501
  Edge count: 0
  Projection: GEOGCS["Coordinate System imported from GRIB file",DATUM["unnamed",SPHEROID["Spheroid imported from GRIB file",6378160,298.253916296469]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AXIS["Latitude",NORTH],AXIS["Longitude",EAST]]
  Datasets loaded: OK
  Groups count: 1
  Radar Precipitation Accumulation 72-hour [mm]
  driver:        GRIB
  dataset count: 1
  defined on:    vertices
  min:           -3
  max:           775.2

• if loaded with qgis 3.16 (ltr to be) it shows ok