Re: [netcdf-java] Rotated-pole data

try adding global attribute

 :Conventions = "CF-1.0"


if that doesnt work, send me the actual file.

On 5/20/2010 10:39 AM, Jon Blower wrote:
> Hi,
>
> I have some data in rotated-pole coordinates and I'm struggling to get
> NetCDF-Java (latest 4.1 version) to recognise the coordinate system.  I
> think I'm following CF except that I'm not providing values for the true
> lon and lat values at each grid point.  I was assuming that if I
> provided the grid mapping details that NetCDF-Java might recognise them
> and be able to transform to and from true lat-lon without them (i.e.
> this information is redundant).
>
> However, when I load up the file in ToolUI (4.1) the projection (as
> revealed under the tabs FeatureTypes->Grids) remains LatLon.
>
> The CDL is at the end of the email.  What am I doing wrong?  Or is it in
> fact compulsory to provide the true lon and lats at each grid point?
>
> Thanks,
> Jon
>
> netcdf
> file:C:/Godiva2_data/Rotated-pole/Stefano/04203_qwq111.oper00.pp_001.MOP
> Su.ncml {
>   dimensions:
>     Longitude = 360;
>     Latitude = 288;
>     Surface = 1;
>     Time = UNLIMITED;   // (4 currently)
>   variables:
>     float Longitude(Longitude=360);
>       :units = "degrees";
>       :long_name = "longitude in rotated-pole grid";
>       :standard_name = "grid_longitude";
>     float Latitude(Latitude=288);
>       :units = "degrees";
>       :long_name = "latitude in rotated-pole grid";
>       :standard_name = "grid_latitude";
>     float Surface(Surface=1);
>       :units = "surface";
>       :positive = "down";
>     float Time(Time=4);
>       :units = "days since 2007-07-26 11:00:00";
>       :long_name = "time";
>     float Dynamic_rainfall_rate(Time=4, Surface=1, Latitude=288,
> Longitude=360);
>       :units = "kg m-2 s-1";
>       :long_name = "LARGE SCALE RAINFALL RATE KG M-2 S-1";
>       :title = "LARGE SCALE RAINFALL RATE KG M-2 S-1";
>       :source = "UM output";
>       :missing_value = -32768.0f; // float
>       :_FillValue = -32768.0f; // float
>       :grid_mapping = "rotated_pole";
>     char rotated_pole;
>       :grid_mapping_name = "rotated_latitude_longitude";
>       :grid_north_pole_latitude = "37.5";
>       :grid_north_pole_longitude = "177.5";
>
>   :History = "Created_by_convert_pp_2_netcdf_at_NCEO";
> }
>
> --
> Dr Jon Blower
> Technical Director, Reading e-Science Centre
> Environmental Systems Science Centre
> University of Reading
> Harry Pitt Building, 3 Earley Gate
> Reading RG6 6AL. UK
> Tel: +44 (0)118 378 5213
> Fax: +44 (0)118 378 6413
> address@hidden
> http://www.nerc-essc.ac.uk/People/Staff/Blower_J.htm
>
>
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