Re: OpeNDAP can't work

Wei,
I've checked on this.
The file I downloaded is:
-rw-r--r-- 1 lds lds 65497992 2012-08-30 14:14 ncl_ncarg-6.1.0-beta.Linux_Debian_i686_gcc445.tar.gz

Is there any other way to check if the NCL I installed is OPeNDAP-enabled or not?

Thanks.

Dongsheng

ÔÚ 2012-09-04 22:51:23£¬"Wei Huang" <huangwei@ucar.edu> дµÀ£º
Dongsheng,

It seems you have installed an OpenDAP-disabled version of NCL.
Can you check on this?

Or you can re-download NCL, and make sure it is openDAP enabled.

As on my machine, I got:

ncl opendap.ncl
 Copyright (C) 1995-2012 - All Rights Reserved
 University Corporation for Atmospheric Research
 NCAR Command Language Version 6.1.0
 The use of this software is governed by a License Agreement.
 See http://www.ncl.ucar.edu/ for more details.

Variable: exists
Type: logical
Total Size: 4 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes: [1]
Coordinates:
(0) True

Variable: f
Type: file
filename: 123
path: http://test.opendap.org/opendap/data/nc/123.nc
   file global attributes:
      history : This is an example of a multi-line global
attribute. It could be used for representing the
processing history of the data, for example.
      _DODS_Unlimited_Dimension : k
   dimensions:
      i = 2
      j = 3
      l = 3
      maxStrlen64 = 64
   variables:
      integer i ( i )

      float j ( j )

      short l ( l )

      character bears ( i, j, maxStrlen64 )
         act : text string
        123
         acs : -40
         acl : 17000
         acf : ( -2, 1, 0 )
         acd : ( -1, 0.75 )
         string_length : 3

      short order ( i, j )

      integer shot ( i, j )

      float aloan ( i, j )

      double cross ( i, j )

Note that the "exists" variable is True (where yours is false).

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 2, 2012, at 7:23 PM, L wrote:

Wei,
This is my output:

ncl 0> url = "http://test.opendap.org/opendap/data/nc/"
ncl 1> filename = url + "123.nc"
ncl 2>
ncl 3> exists = isfilepresent(filename)
ncopen: filename "http://test.opendap.org/opendap/data/nc/123.nc": NetCDF: Unknown file format
ncl 4> print(exists)

Variable: exists
Type: logical
Total Size: 4 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes: [1]
Coordinates:
(0) False
ncl 5>
ncl 6> f = addfile(filename, "r")
fatal:NetCDF: Unknown file format
fatal:Could not open (http://test.opendap.org/opendap/data/nc/123.nc)
ncl 7> print(f)

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

Regards,
Dongsheng

ÔÚ 2012-09-01 09:11:40£¬L <dxlds@163.com> дµÀ£º

Wei,

Thanks for your reply.

Sorry I can't send you the exact output message right now, as I am not with the working computer.
I am wondering, if there is any other equirement except the libdap? like, should I compile the netcdf with the ¨Cenable-dap flag ?
The isfilepresent command with an url file in my computer seems not trying to connect to the Internet, and it sends the message 'unknow file format' back to the sceen immediately.

Dongsheng

At 2012-09-01 06:58:22,"Wei Huang" <huangwei@ucar.edu> wrote:
Dongsheng,

Can you try this script:

 url = "http://test.opendap.org/opendap/data/nc/"
 filename = url + "123.nc"

 exists = isfilepresent(filename)
 print(exists)

 f = addfile(filename, "r")
 print(f)

And send the output/error message to us?

(This script runs fine on my system).

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 Aug 31, 2012, at 12:55 AM, L wrote:

 Hi
I have a problem about OpeNDAP.
The NCL precompiled binary file I downloaded is ncl_ncarg-6.1.0-beta.Linux_Debian_x86_64_gcc445.tar.gz.
By typing ncl on the command line, it just shows:
---------------------------------------------------------
 Copyright (C) 1995-2012 - All Rights Reserved
 University Corporation for Atmospheric Research
 NCAR Command Language Version 6.1.0-beta
 The use of this software is governed by a License Agreement.
 See http://www.ncl.ucar.edu/ for more details.
ncl 0>
---------------------------------------------------------

no such words like :ncl: error while loading shared libraries: libdap.so.4: cannot open shared object file: No such file or directory

But when I follow the test
------------------------------
 url = "http://test.opendap.org/opendap/data/nc/"
 filename = url + "123.nc"
 exists = isfilepresent(filename)
ncopen: filename "http://test.opendap.org/opendap/data/nc/123.nc": NetCDF: Unknown file format
-------------------------------
Also I have added the libdap library to the LD_LIBRARY_PATH.

Can anyone give me some suggestion?
Thanks.
Regards.

Dongsheng

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Received on Tue Sep 4 18:39:27 2012