Hi Lorea, If you run ncdump -c [file name] the output will show all the information about coordinate systems that was written in the file. If this does not identify the level, then you will have to ask the provider of the data what level was intended. The data provider should be using a convention such as the CF conventions to represent all the coordinate information that describes the time and space coordinates of the data. If the data is written without this information, it is not possible to determine later. The CF conventions document may be found here: http://www.cfconventions.org/ --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: TTJ-726105 Department: Support netCDF Priority: Normal Status: Closed