Re: [idvdevelopers] Idv netcdf problem

• To: Maswood Hasan Mostafi <mostafi@xxxxxxxxx>
• Subject: Re: [idvdevelopers] Idv netcdf problem
• From: Don Murray <dmurray@xxxxxxxxxxxxxxxx>
• Date: Tue, 29 Jul 2008 11:13:24 -0600

Hi Maswood-

Can you provide a sample file?  While I think Tom is right that there
may be some naming issues, it does seem to conform to the CF conventions
regardless of names.  Coordinate variables should be identified by
units according to the CF spec.  It's possible that the file is CF
compliant, but the netCDF-Java library is not handling it correctly.

Also, which version of the IDV are you using?

Don

Maswood Hasan Mostafi wrote:

Hi Tom,

Thanks for the quick reply. It seems the convention is CF but still causes
problem.

How to select "grids (netcdf, ...)". Which menu bar ?

I have attached a header dump of a file. Original file size is 170 MB , so
could not attach that.

 Thanks again for the help.

Maswood

======================================================
netcdf C:\MamVisAD\EnviroData\Bathymetry\2\2 {
dimensions:
    t = 577 ;
    z = 1 ;
    y = 321 ;
    x = 241 ;
variables:
    float t(t) ;
        t:long_name = "time" ;
        t:units = "days since 1984-1-1 00:00:00" ;
    float z(z) ;
        z:long_name = "depth" ;
        z:units = "m" ;
    float y(y) ;
        y:long_name = "latitude" ;
        y:units = "degrees_north" ;
    float x(x) ;
        x:long_name = "longitude" ;
        x:units = "degrees_east" ;
    float eastward_sea_water_velocity(t, z, y, x) ;
        eastward_sea_water_velocity:long_name =
"eastward_sea_water_velocity" ;
        eastward_sea_water_velocity:standard_name =
"eastward_sea_water_velocity" ;
        eastward_sea_water_velocity:units = "m/s" ;
        eastward_sea_water_velocity:_FillValue = 1.#QNAN00f ;
        eastward_sea_water_velocity:add_offset = 0.f ;
        eastward_sea_water_velocity:scale_factor = 1.f ;

// global attributes:
        :Conventions = "CF-1.0" ;
        :title = "MERSEA_NATL_ANAL" ;
}
=================================================================



On Mon, Jul 28, 2008 at 10:58 AM, Tom Whittaker <whittaker@xxxxxxxx> wrote:

Generally, NetCDF files that are CF compliant will open and display
without difficulty.  Be sure to select the correct "type" (for
example, "grids (netcdf, ...)".  If that does not help, please send
along at least a header dump (ncdump -h) of the file -- or post the
file where we can have a look at it.

tom

On Mon, Jul 28, 2008 at 8:35 AM, Maswood Hasan Mostafi
<mostafi@xxxxxxxxx> wrote:

Hi,

I have problems of viewing netCDF file using IDV. Just trying to open the
file using the software
is not working.Is there any particular way to open netCDF file using IDV

?

Thanks

Maswood
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Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
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Don Murray                               UCAR Unidata Program
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  • [idvdevelopers] Idv netcdf problem
    • From: Maswood Hasan Mostafi
  • Re: [idvdevelopers] Idv netcdf problem
    • From: Tom Whittaker
  • Re: [idvdevelopers] Idv netcdf problem
    • From: Maswood Hasan Mostafi