[Paraview] [EXTERNAL] Paraview can't show grads origin data

[wang]

Thanks for your reply.

Grads is a software package that widely used by meteorological societies
  worldwide. http://www.iges.org/grads/.
The nc file I get can  be shown by ferret (which is also a software package
used by earth science communities) and Grads (Grads can read binary and
data).

The problem may occurred by conversion...

Xueli

Moreland, Kenneth wrote:
> I don't know what you mean by a "grad" or what problem it is causing, so
> I'm going to make a total guess.  I am guessing that you mean gradian (a
> unit equal to 9/10 of a degree).  Furthermore, because I can't think of
> any other way such units would mess you up, I am guessing that you are
> trying to write spherical coordinates in terms of gradians, but ParaView
> is interpreting them either as degrees or as Cartesian coordinates.
>
>
> Assuming that this is the problem, it is caused by the fact that the
> default netCDF reader for ParaView honors the CF convention
> (http://cf-pcmdi.llnl.gov), and the CF convention specifies spherical
> coordinates in terms of degrees.  To specify angles in any other units is
> to break the convention.
>
> Your best solution is to convert your gradians to degrees (it's OK to have
> floating-point degrees) and write a netCDF file that properly follows the
> CF convention.
>
> If I have completely missed the point of your question, you'll have to
> better explain what are grads and what problem you are having with them.
>
> -Ken
>
> On 3/12/12 10:13 AM, "wang"<wang at knmi.nl>  wrote:
>
>    
>> Dear Paraview users,
>>
>> I have problem with data that origin of grads. We have a program to
>> convert grads data into NetCDF format. But this data can not be shown in
>> Paraview. I don't have any problem to show normal nc data.
>>
>> Have you ever experience the same problem?
>>
>> Thanks!
>> Xueli
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