[ncl-talk] set_dimension_query

[Kunal Bali]

Thanks for providing this information.

Also, I would like to mention that when I plot this data. The values are
not in the domain. I mean the real values lie in-between 0 to 1 but here it
is reaching to 400.

So, how to correct the values?

Description of the variable is

short Optical_Depth_055(YDim=1200, XDim=1200);
  :long_name = "AOT at 0.55 micron";
  :scale_factor = 0.001; // double
  :add_offset = 0.0; // double
  :unit = "None";
  :_FillValue = -28672S; // short
  :valid_range = -100S, 5000S; // short




Kunal Bali






On Wed, Sep 13, 2017 at 10:28 PM, Adam Phillips <asphilli at ucar.edu> wrote:

> Hi Kunal,
> Yes, clicking on the output netCDF link from the Applications page:
> http://www.ncl.ucar.edu/Applications/o-netcdf.shtml
> I would recommend following the inefficient method #1. Unless you are
> writing a file with many large variables, the inefficient method works just
> fine.
> http://www.ncl.ucar.edu/Applications/method_1.shtml
> Good luck,
> Adam
>
> On Wed, Sep 13, 2017 at 10:25 AM, Kunal Bali <kunal.bali9 at gmail.com>
> wrote:
>
>> Thank you so much, it worked
>>
>> I want to know one more thing.
>> After rearranging the dimensions can we now convert (or write) this
>> arranged file into netcdf format?
>>
>>
>>
>> Kunal Bali
>>
>>
>>
>>
>>
>>
>> On Wed, Sep 13, 2017 at 8:55 PM, Adam Phillips <asphilli at ucar.edu> wrote:
>>
>>> Hi Kunal,
>>> I think you just need to rearrange the order of your lines and tweak a
>>> couple of lines. As the error message states, lat is not defined in your
>>> 3rd line and you are referring to it as if it is.Try this:
>>> a = addfile("/media/Local Disk/NPL/MODIS_FPC/MAIACTAOT.h
>>> 00v02.20000570505.hdf","r")
>>> var  = a->Optical_Depth_055(:,:)
>>> nlat = 1200
>>> nlon = 1200
>>> lat = latGlobeFo(nlat, "lat", "latitude", "degrees_north")
>>> lon = lonGlobeFo(nlon, "lon", "longitude", "degrees_east")
>>> lat = lat(::-1)
>>> lon = (/ lon - 180. /)  ; subtract 180 from all values
>>> lon&lon = lon           ; update coordinates
>>>
>>> var!0 = "lat"    ; you can name these dimensions whatever you want..
>>> var!1 = "lon"
>>> var&lat = lat     ; but make sure you refer to the correct named
>>> dimensions
>>> var&lat = lon
>>> ;var&XDim_grid1km = lat
>>> ;var&YDim_grid1km = lon
>>>
>>> If you have any further questions please respond to the ncl-talk email
>>> list.
>>> Adam
>>>
>>>
>>>
>>> On Wed, Sep 13, 2017 at 8:38 AM, Kunal Bali <kunal.bali9 at gmail.com>
>>> wrote:
>>>
>>>> Dear NCL
>>>>
>>>> I have a file with the variable summary. The dimensions are in 2D.
>>>>
>>>> ncl 2>  printVarSummary(var)
>>>>
>>>> Variable: var
>>>> Type: short
>>>> Total Size: 2880000 bytes
>>>>             1440000 values
>>>> Number of Dimensions: 2
>>>> Dimensions and sizes:    [*YDim_grid1km | 1200] x [XDim_grid1km |
>>>> 1200]*
>>>> Coordinates:
>>>> Number Of Attributes: 7
>>>>   long_name :    AOT at 0.55 micron
>>>>   scale_factor :    0.001
>>>>   add_offset :       0
>>>>   unit :    None
>>>>   _FillValue :    -28672
>>>>   valid_range :    ( -100, 5000 )
>>>>   hdf_name :    Optical_Depth_055
>>>>
>>>>
>>>> I am trying to read the dimensions of this file as
>>>>
>>>> begin
>>>> ;---Read data
>>>>          a = addfile("/media/Local Disk/NPL/MODIS_FPC/MAIACTAOT.h
>>>> 00v02.20000570505.hdf","r")
>>>>
>>>>             var  = a->Optical_Depth_055(:,:)
>>>>
>>>>          var&XDim_grid1km = lat
>>>>          var&YDim_grid1km = lon
>>>>
>>>>         nlat = 1200
>>>>          nlon = 1200
>>>>             lat = latGlobeFo(nlat, "lat", "latitude", "degrees_north")
>>>>         lon = lonGlobeFo(nlon, "lon", "longitude", "degrees_east")
>>>>             lat = lat(::-1)
>>>>             lon = (/ lon - 180. /)  ; subtract 180 from all values
>>>>             lon&lon = lon           ; update coordinates
>>>>
>>>>
>>>>         var!0 = "lat"
>>>>         var!1 = "lon"
>>>>
>>>>
>>>> But the error appeared as
>>>> *fatal:Variable (lat) is undefined*
>>>>
>>>>
>>>> So, could anyone please let me know that how to read dimension of this
>>>> file.
>>>>
>>>> Thank You
>>>>
>>>>
>>>> Regards
>>>> Kunal Bali
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>>
>>>>
>>>
>>>
>>> --
>>> Adam Phillips
>>> Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
>>> www.cgd.ucar.edu/staff/asphilli/   303-497-1726 <(303)%20497-1726>
>>>
>>> <http://www.cgd.ucar.edu/staff/asphilli>
>>>
>>
>>
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>>
>
>
> --
> Adam Phillips
> Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
> www.cgd.ucar.edu/staff/asphilli/   303-497-1726
>
> <http://www.cgd.ucar.edu/staff/asphilli>
>
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