[gradsusr] Error opening NetCDF file
nitin patil
nitinpatil85 at gmail.com
Thu May 10 06:47:36 EDT 2012
try to use sdfopen filename.nc
On Thu, May 10, 2012 at 4:12 PM, Sudev Das M P <devdas.pnr at gmail.com> wrote:
> Hai,
>
> I have taken a netcdf data file from the following link:
> http://www.nio.org/index/option/com_nomenu/task/show/tid/2/sid/18/id/229
>
> While I try to open this file in GrADS I got the following error message:
> ====================================================
> ga-> sdfopen nioa_climatology_monthly_temp_salt_nio.nc
> Scanning self-describing file: nioa_climatology_monthly_temp_salt_nio.nc
> SDF Error: 365 day calendars are no longer supported by sdfopen.
> To open this file with GrADS, use a descriptor file with
> a complete TDEF entry and OPTIONS 365_day_calendar.
> ====================================================
>
> Then I made a descriptor file as given below:
> -----------------------------------------------------------------
> DSET ^nioa_climatology_monthly_temp_salt_nio.nc
> UNDEF -1.e+34f
> XDEF 90 LINEAR 30.5 1
> YDEF 70 LINEAR -29.5 1
> ZDEF 24 LEVELS 0 10 20 30 50 75 100 125 150 200 250 300 400 500 600
> 700 800 900 1000 1100 1200 1300 1400 1500
> TDEF 12 LINEAR 1Jan9999 1mo
> OPTIONS 365_day_calendar
> VARS 2
> temp 24 0 NIOA climatology monthly temp (degC) NIO
> salt 24 0 NIOA climatology monthly salt (psu) NIO
> ENDVARS
> --------------------------------------------------------------
>
> Then I tried to open it using "xdfopen" command, but then I got the
> following message:
> ======================================================
> ga-> xdfopen nioa_climatology_monthly_temp_salt_nio.ctl
> Scanning Descriptor File: nioa_climatology_monthly_temp_salt_nio.ctl
> gadxdf error: Missing or invalid dimension size.
> --> The invalid description file record is:
> --> xdef 90 linear 30.5 1
> The data file was not opened.
> ======================================================
>
> Please give me your valuable suggestion to solve this problem.
>
> The complete details of the data file is given below:
>
> regards,
> sudev
>
> ========================================================
> ncdump -h nioa_climatology_monthly_temp_salt_nio.nc
> netcdf nioa_climatology_monthly_temp_salt_nio {
> dimensions:
> LONGITUDE = 90 ;
> LATITUDE = 70 ;
> DEPTH = 24 ;
> TIME = UNLIMITED ; // (12 currently)
> variables:
> double LONGITUDE(LONGITUDE) ;
> LONGITUDE:units = "degrees_east" ;
> LONGITUDE:modulo = 360. ;
> LONGITUDE:point_spacing = "even" ;
> LONGITUDE:axis = "X" ;
> double LATITUDE(LATITUDE) ;
> LATITUDE:units = "degrees_north" ;
> LATITUDE:point_spacing = "even" ;
> LATITUDE:axis = "Y" ;
> double DEPTH(DEPTH) ;
> DEPTH:positive = "down" ;
> DEPTH:point_spacing = "uneven" ;
> DEPTH:axis = "Z" ;
> double TIME(TIME) ;
> TIME:units = "MONTHS(NOLEAP) since 0000-01-01 00:00:00" ;
> TIME:time_origin = "01-JAN-0000 00:00:00" ;
> TIME:calendar = "NOLEAP" ;
> TIME:modulo = 12. ;
> TIME:axis = "T" ;
> float TEMP(TIME, DEPTH, LATITUDE, LONGITUDE) ;
> TEMP:units = "degreeC" ;
> TEMP:missing_value = -1.e+34f ;
> TEMP:_FillValue = -1.e+34f ;
> TEMP:long_name = "Temperature" ;
> float SALT(TIME, DEPTH, LATITUDE, LONGITUDE) ;
> SALT:units = "PSU" ;
> SALT:missing_value = -1.e+34f ;
> SALT:_FillValue = -1.e+34f ;
> SALT:long_name = "Salinity" ;
>
> ...................................................................................................................................
>
> ..................................................................................................................................
> LONGITUDE = 30.5, 31.5, 32.5, 33.5, 34.5, 35.5, 36.5, 37.5, 38.5, 39.5,
> 40.5, 41.5, 42.5, 43.5, 44.5, 45.5, 46.5, 47.5, 48.5, 49.5, 50.5, 51.5,
> 52.5, 53.5, 54.5, 55.5, 56.5, 57.5, 58.5, 59.5, 60.5, 61.5, 62.5, 63.5,
> 64.5, 65.5, 66.5, 67.5, 68.5, 69.5, 70.5, 71.5, 72.5, 73.5, 74.5, 75.5,
> 76.5, 77.5, 78.5, 79.5, 80.5, 81.5, 82.5, 83.5, 84.5, 85.5, 86.5, 87.5,
> 88.5, 89.5, 90.5, 91.5, 92.5, 93.5, 94.5, 95.5, 96.5, 97.5, 98.5, 99.5,
> 100.5, 101.5, 102.5, 103.5, 104.5, 105.5, 106.5, 107.5, 108.5, 109.5,
> 110.5, 111.5, 112.5, 113.5, 114.5, 115.5, 116.5, 117.5, 118.5, 119.5 ;
>
> LATITUDE = -29.5, -28.5, -27.5, -26.5, -25.5, -24.5, -23.5, -22.5, -21.5,
> -20.5, -19.5, -18.5, -17.5, -16.5, -15.5, -14.5, -13.5, -12.5, -11.5,
> -10.5, -9.5, -8.5, -7.5, -6.5, -5.5, -4.5, -3.5, -2.5, -1.5, -0.5, 0.5,
> 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 11.5, 12.5, 13.5,
> 14.5, 15.5, 16.5, 17.5, 18.5, 19.5, 20.5, 21.5, 22.5, 23.5, 24.5, 25.5,
> 26.5, 27.5, 28.5, 29.5, 30.5, 31.5, 32.5, 33.5, 34.5, 35.5, 36.5, 37.5,
> 38.5, 39.5 ;
>
> DEPTH = 0, 10, 20, 30, 50, 75, 100, 125, 150, 200, 250, 300, 400, 500,
> 600,
> 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500 ;
>
> TIME = 0.46027397260274, 1.47945205479452, 2.4, 3.41917808219178,
> 4.40547945205479, 5.42465753424658, 6.41095890410959, 7.43013698630137,
> 8.44931506849315, 9.43561643835617, 10.4547945205479, 11.441095890411 ;
> ================================================================
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--
Regards,
Mr. Nitin Patil
Ph.D. Research Scholar,
Centre of Excellence in Climate Studies,
Indian Institute of Technology (IIT) Bombay,
Powai, Mumbai - 400076, INDIA.
e-mail: nupatil at iitb.ac.in
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