Re: OPeNDAP

Wei,
   Please see the following:
--------------------------------------------
ncopen: filename "http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20120907/gfs_hd_00z": NetCDF: Unknown file format
(0) File: <http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20120907/gfs_hd_00z>, existence: False
fatal:NetCDF: Unknown file format
fatal:Could not open (http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20120907/gfs_hd_00z)

Variable: f
Type: file
(0) File Missing Value : -1
------------------------------------
  Thanks
Mingxaun

On Sep 19, 2012, at 10:32 AM, Wei Huang <huangwei@ucar.edu> wrote:

> Mingxuan,
>
> That server could have some problem.
>
> Can you try script:
>
> flnm = "http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20120907/gfs_hd_00z"
> exists = isfilepresent(flnm)
> print("File: <" + flnm + ">, existence: " + exists)
>
> f = addfile(flnm, "r")
> print(f)
>
> and let us know if there is any problem?
>
> Thanks,
>
> Wei
>
> huangwei@ucar.edu
> VETS/CISL
> National Center for Atmospheric Research
> P.O. Box 3000 (1850 Table Mesa Dr.)
> Boulder, CO 80307-3000 USA
> (303) 497-8924
>
>
>
>
>
>
> On Sep 19, 2012, at 10:07 AM, Mingxuan Chen wrote:
>
>> Hello,
>> My machine is in Mac OS X 10 8.1, ncl version is 6.1.0-beta and I want to access OPENDAP data.
>> I tried opendap.ncl
>> --------------------------------------
>> ncopen: filename "http://test.opendap.org/data/nc/123.nc": NetCDF: Unknown file format
>> (0) OPeNDAP isfilepresent test unsuccessful.
>> (0) Either file doesn't exist, or NCL does not have OPeNDAP capabilities on this system
>> ---------------------
>> What is wrong?
>>
>> Thank you for your help!
>>
>>
>> Mingxuan
>>
>> ------opendap.ncl-----------------
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/shea_util.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/diagnostics_cam.ncl"
>>
>> begin
>> url= "http://test.opendap.org/data/nc/"
>> filename = url + "123.nc"
>> print(filename)
>> exists = isfilepresent(filename)
>> if(.not.exists) then
>> print("OPeNDAP isfilepresent test unsuccessful.")
>> print("Either file doesn't exist, or NCL does not have OPeNDAP capabilities on this system")
>> else
>> print("OPeNDAP isfilepresent test successful.")
>> f = addfile(filename,"r")
>> vars = getfilevarnames(f)
>> print(vars) ; should be (in any order): "l","j","i","cross","aloan",
>> ; "shot","order","bears"
>> end if
>> end
>> -----------------
>>
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Received on Wed Sep 19 10:41:19 2012