id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type 1336946890,I_kwDOAMm_X85PsDDK,6909,Loading icon-d2,21034385,closed,0,,,3,2022-08-12T09:04:46Z,2022-08-17T19:25:51Z,2022-08-17T19:25:51Z,NONE,,,,"### What is your issue? Hej Everybody (Hi Julius :) ), we are using the DWD Icon models a lot, but I currently have the issue loading files with `'generalVerticalLayer'`, which is their description for a vertical axis. It seems to me, that xarray is not recognizing it as a coordinate. cfgrib 0.9.8.5 xarray 0.19.0 ```python import xarray as xr file_list = ['icon-d2_germany_regular-lat-lon_model-level_2022052303_000_59_u.grib2', 'icon-d2_germany_regular-lat-lon_model-level_2022052303_000_64_u.grib2'] ds = xr.open_dataset(file_list, engine='cfgrib') ``` ```python-traceback ValueError: Could not find any dimension coordinates to use to order the datasets for concatenation ``` Find the data attached: [icon-d2_germany_regular-lat-lon_model-level_2022052303_000_u.zip](https://github.com/pydata/xarray/files/9315066/icon-d2_germany_regular-lat-lon_model-level_2022052303_000_u.zip) ","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/6909/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue