Re: Composite problem

It is not evident what you did when trying to plot the NARR data.

There is a NARR data URL:
    http://www.ncl.ucar.edu/Applications/narr.shtml

The NARR grid is a curvilinear grid and there are two ways to plot
curvilinear grids in NCL. In your case, just use example 1.
This uses the res@tfDoNDCOverlay=True setting.

Good luck

On 3/18/13 7:16 AM, Sho Kawazoe wrote:
> Emily,
>
> There is a good resource page through the NCL homepage that can probably
> help you.
> http://www.ncl.ucar.edu/Document/Graphics/error_msg.shtml
>
> It looks like you either renamed or changed your coordinate dimensions. Did
> you carry over the coordinate metadata when you changed these as well? You
> can always do a printVarSummary on your gridx_221 for example, to ensure
> all attributes are carried over to these newly defined coordinate
> dimensions.
>
> Hope this helps!
> Sho
> On Mar 18, 2013 2:54 AM, "emily carlson" <mspmoose123@gmail.com> wrote:
>
>> I am attempting to make composites of narr data based on similar synoptic
>> case studies. I have used grib_api to append these non-sequential files
>> into one grib file. The var command gives the following dimensions for the
>> file:
>>
>> Number of Dimensions: 3
>> Dimensions and sizes: [initial_time0_hours | 3] x [gridx_221 | 277] x
>> [gridy_221 | 349]
>> Coordinates:
>> initial_time0_hours: [1667052..1823115]
>> Number Of Attributes: 14
>> sub_center : The North American Regional Reanalysis (NARR) Project
>> center : US National Weather Service - NCEP (WMC)
>> long_name : Geopotential height
>> coordinates : gridlat_221 gridlon_221
>> level_indicator : 100
>> grid_number : 221
>> level : 500
>> forecast_time : 0
>> forecast_time_units : hours
>>
>> I try applying either
>> zave = dim_avg_n_Wrap(x,0)
>> zave = dim_avg_Wrap( x(gridy_221|:, gridx_221|:, initial_time0_hours|:) )
>>
>> The varsummary average file output is the following:
>> Variable: zave
>> Type: float
>> Total Size: 386692 bytes
>> 96673 values
>> Number of Dimensions: 2
>> Dimensions and sizes: [gridy_221 | 349] x [gridx_221 | 277]
>> Coordinates:
>> Number Of Attributes: 15
>> forecast_time_units : hours
>> forecast_time : 0
>> level : 500
>> model : North American Regional Reanalysis (NARR)
>> parameter_number : 7
>> parameter_table_version : 131
>> grid_number : 221
>> level_indicator : 100
>> coordinates : gridlat_221 gridlon_221
>> average_op_ncl : dim_avg over dimension(s): initial_time0_hours
>>
>>
>> And I receive this error when trying to plot and produces a blank plot:
>>
>> (0) check_for_y_lat_coord: Warning: Data either does not contain a
>> valid latitude coordinate array or doesn't contain one at all.
>> (0) A valid latitude coordinate array should have a 'units' attribute
>> equal to one of the following values:
>> (0) 'degrees_north' 'degrees-north' 'degree_north' 'degrees north'
>> 'degrees_N' 'Degrees_north' 'degree_N' 'degreeN' 'degreesN' 'deg north'
>>
>> Any suggestions on what I might be doing wrong, or any suggestions on how
>> to correctly implement non sequential composites? Thank you!
>>
>> Sincerely,
>> Emily
>>
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>
>
>
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Received on Mon Mar 18 11:00:20 2013