Hi Cecelia, > I have converted my grib-files to netcdf to make it easier to share the > data with others. I want to use Godiva2 to visualize (and opendap to > cutout and make ascii-files) but it seems that I do not have information > enough for Godiva in my files. Is it possible to find a description > about essential metadata and data in the netcdf for Godiva2? Adding to Ward's answer, I know a little more about ncWMS, which is needed for Godiva2 but distributed with Unidata THREDDS software. ncWMS requires that the data be a grid, and more specifically that it conform to the CF Metadata Conventions for gridded data, to specify how the coordinate system and projection information are represented. This is primarily done with a few standard attributes added to grid variables. A lot of this is handled by netCDF-Java, which provides a Common Data Model (CDM) for capturing coordinate system metadata. In fact, if you read GRIB data using netCDF-Java, it converts it to data that conforms to the CDM on the fly, with the necessary CF attributes added, so that ncWMS and Godiva2 can display it. You can also use NcML (netCDF Markup language) to add missing attributes to netCDF data to make it appear to conform to conventions, without changing the original non-conforming data. NcML is supported by netCDF-Java, and can be used to decorate local data, without first putting it on a THREDDS server. The netCDF C library has no support for NcML. Finally, another tool that may be useful is ToolsUI, a Java program associated with netCDF-Java and THREDDS that checks conformity with the requirements of the Common Data Model to tell you what's missing to represent the coordinate systems for your data. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: EHB-236121 Department: Support netCDF Priority: Normal Status: Closed
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