Re: Question for ncl usnig MODIS data

If you run "ncl_filedump" on one of the files, you may see the Grid projection information.

Snippet from running on one of my MODIS hdf files:

GridName="MCD43GF_30arc_second"
                XDim=43200
                YDim=21600
                UpperLeftPointMtrs=(-180000000.000000,90000000.000000)
                LowerRightMtrs=(180000000.000000,-90000000.000000)
                Projection=GCTP_GEO

On 19/12/2013, at 10:38 AM, 김미애 wrote:

> Hello,
>
>
> Thank you so much. Previous reply was really helpful to me.
>
> However, I still have a problem.
>
> I added the extension ".he2" to the hdf filename, but I have an error message as below.
>
>
> fatal:(he2_file) does not reference a file
>
> fatal:Execute: Error occurred at or near line 49 in file wgtavg1.ncl
>
>
> I don't even know exactly the meaning of the error message.
> The following is my changed code. Which part am I wrong in the code?
>
> Thank you
>
> ==============================================================================
> eos_file_path="/MODIS/2009/h28v05/" ;Read file for the first time.
>
> eos_file_paths=systemfunc("ls "+eos_file_path+"MOD11A2.A2009*.hdf")
>
> eos_file=addfiles(eos_file_paths,"r")
>
>
> he2_file_path="/MODIS/2009/h28v05/" ;Read file for the second time to efficiently obtain lat and lon
>
> he2_file_paths=systemfunc("ls "+he2_file_path+"MOD11A2.A2009*.hdf")
>
> he2_file=addfiles(he2_file_paths+".he2","r")
>
>
> ;List available fields and attributes
>
> ;print(eos_file)
>
>
> ;Read data field
>
> data_raw=eos_file[:]->LST_Day_1km
>
> ;printVarSummary(data_raw)
>
>
> ;Filter out invalid values and set them as fill value.
>
> data_valid=where(data_raw.gt.data_raw@valid_range(0).and.data_raw.lt.data_raw@valid_range(1), data_raw, data_raw@_FillValue)
>
>
> ;Apply scale factor according to the field attribute
>
> ;correct_data_value=(raw_data_value-offset)*scale_factor
>
> data=(data_valid-data_raw@add_offset)*data_raw@scale_factor
>
>
> data@_FillValue=(data_raw@_FillValue-data_raw@add_offset)*data_raw@scale_factor
>
>
> data@long_name=data_raw@long_name
>
> data@units=data_raw@units
>
>
> ;Associate longitude & latitude
>
> data@lat2d=he2_file->GridLat_MODIS_Grid_8Day_1km_LST
>
> data@lon2d=he2_file->GridLon_MODIS_Grid_8Day_1km_LST
>
>
> dims= dimsizes(data_raw)
>
> ny=dims(0)
>
> nx=dims(1)
>
> nfile = ny/nx
>
>
> input=new((/nfile,nx,nx/),float)
>
> do i=0,nfile-1
>
> input(i,:,:)=data_raw(i*nx:i*nx+nx-1,:) ;t*x*y
>
> end do
>
>
> wgt1=(/1, 1, 1, 0.875/)
>
> wgt2=(/0.125, 1, 1, 1, 0.5/)
>
> wgt3=(/0.5, 1, 1, 1, 0.375/)
>
> wgt4=(/0.625, 1, 1, 1, 0.125/)
>
> wgt5=(/0.875, 1, 1, 1/)
>
> wgt6=(/1, 1, 1, 0.75/)
>
> wgt7=(/0.25, 1, 1, 1, 0.625/)
>
> wgt8=(/0.375, 1, 1, 1, 0.5/)
>
> wgt9=(/0.5, 1, 1, 1, 0.25/)
>
> wgt10=(/0.75, 1, 1, 1, 0.125/)
> wgt11=(/0.875, 1, 1, 0.875/)
> wgt12=(/0.125, 1, 1, 1, 0.75/)
>
> avg1=dim_avg_wgt_n_Wrap(input(0:3,:,:), wgt1, 1, 0)
> avg2=dim_avg_wgt_n_Wrap(input(3:7,:,:), wgt2, 1, 0)
> avg3=dim_avg_wgt_n_Wrap(input(7:11,:,:), wgt3, 1, 0)
> avg4=dim_avg_wgt_n_Wrap(input(11:15,:,:), wgt4, 1, 0)
> avg5=dim_avg_wgt_n_Wrap(input(15:18,:,:), wgt5, 1, 0)
> avg6=dim_avg_wgt_n_Wrap(input(19:22,:,:), wgt6, 1, 0)
> avg7=dim_avg_wgt_n_Wrap(input(22:26,:,:), wgt7, 1, 0)
> avg8=dim_avg_wgt_n_Wrap(input(26:30,:,:), wgt8, 1, 0)
> avg9=dim_avg_wgt_n_Wrap(input(30:34,:,:), wgt9, 1, 0)
> avg10=dim_avg_wgt_n_Wrap(input(34:38,:,:), wgt10, 1, 0)
> avg11=dim_avg_wgt_n_Wrap(input(38:41,:,:), wgt11, 1, 0)
> avg12=dim_avg_wgt_n_Wrap(input(41:45,:,:), wgt12, 1, 0)
>
> fout=addfile("lst_mon1.nc","c")
> fout->lst=avg1
> fout=addfile("lst_mon2.nc","c")
> fout->lst=avg2
> fout=addfile("lst_mon3.nc","c")
> fout->lst=avg3
> fout=addfile("lst_mon4.nc","c")
> fout->lst=avg4
> fout=addfile("lst_mon5.nc","c")
> fout->lst=avg5
> fout=addfile("lst_mon6.nc","c")
> fout->lst=avg6
> fout=addfile("lst_mon7.nc","c")
> fout->lst=avg7
> fout=addfile("lst_mon8.nc","c")
> fout->lst=avg8
> fout=addfile("lst_mon9.nc","c")
> fout->lst=avg9
> fout=addfile("lst_mon10.nc","c")
> fout->lst=avg10
> fout=addfile("lst_mon11.nc","c")
> fout->lst=avg11
> fout=addfile("lst_mon12.nc","c")
> fout->lst=avg12
> end
> =========================================================================
>
> Thank you so much again.
>
> Sincerely
>
> Miae
>
> -------------------------------------------------
> Miae Kim
> School of Urban and Environment Engineering
> Ulsan National Institute of Science and Technology (UNIST)
> UNIST-gil 50, Ulsan 689-798, South Korea
> Mobile: +82-10-9421-8287
> E-mail: toa0710@naver.com
> _______________________________________________
> ncl-talk mailing list
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Received on Wed Dec 18 16:43:00 2013