Greetings Jitka, We currently do not handle unstructured grids in netCDF-Java. We have a proposal awaiting review to fund the work to support unstructured grids, but even if funded, it will be at least a years worth of work to get it up and running. This work will need to be done before attempting unstructured grids in GRIB, as the GRIB code works at the level of netCDF-Java where coordinate systems need to be fully understood, which is pretty high up in data netCDF-Java API. Cheers, Sean > Dear NetCdf support team, > > We are attempting to import the global ICON weather forecasts provided by the > German Weather Service. The forecasts are defined at an irregular grid. When > opening the grib2 file using NetCDF , we get an error saying âNo records > found in datasetâ (see below). We are using NetCdf Java 4.6.3. Panoply > 4.8.9. shows the same message. > > Alternative products such as wgrib2 and degrib do acknowledge the presence of > data (but are unable to probe this, either, due to the unknown grid > definition). > > We were thinking that this error message possibly constitutes a bug. Would > you agree? If so, is this something you would consider fixing? > > Sample files may be downloaded from > https://opendata.dwd.de/weather/icon/global/grib/00/tot_prec/ > > Best regards, > > Jitka Tacoma > Deltares > > > Caused by: java.lang.IllegalStateException: No records found in dataset > ICON_iko_single_level_elements_world_TOT_PREC_2018032606_010.grib > at > ucar.nc2.grib.collection.Grib2CollectionBuilder.makeGroups(Grib2CollectionBuilder.java:155) > at > ucar.nc2.grib.collection.GribCollectionBuilder.createMultipleRuntimeCollections(GribCollectionBuilder.java:150) > at > ucar.nc2.grib.collection.GribCollectionBuilder.createIndex(GribCollectionBuilder.java:138) > at > ucar.nc2.grib.collection.GribCdmIndex.openGribCollectionFromDataFile(GribCdmIndex.java:780) > at > ucar.nc2.grib.collection.GribCdmIndex.openGribCollectionFromDataFile(GribCdmIndex.java:764) > at > ucar.nc2.grib.collection.GribCdmIndex.openGribCollectionFromRaf(GribCdmIndex.java:734) > at ucar.nc2.grib.collection.GribIosp.open(GribIosp.java:186) > at ucar.nc2.NetcdfFile.<init>(NetcdfFile.java:1571) > at ucar.nc2.NetcdfFile.open(NetcdfFile.java:846) > at ucar.nc2.NetcdfFile.open(NetcdfFile.java:446) > ... 39 more > > > Jitka Tacoma Ticket Details =================== Ticket ID: ESI-333031 Department: Support netCDF Java Priority: Normal Status: Open =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.