On 08/13/2015 05:55 PM, Jason Swails wrote:
On Thu, Aug 13, 2015 at 6:32 AM, Tom P <werot...@freent.dd
<mailto:werot...@freent.dd>> wrote:
I'm having a problem trying to access OpenDAP files using netCDF4.
The netCDF4 is installed from the Anaconda package. According to
their changelog, openDAP is supposed to be supported.
netCDF4.__version__
Out[7]:
'1.1.8'
Here's some code:
url =
'http://www1.ncdc.noaa.gov/pub/data/cmb/ersst/v3b/netcdf/ersst.201507.nc'
nc = netCDF4.Dataset(url)
I get the error -
netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Dataset.__init__
(netCDF4/_netCDF4.c:9551)()
RuntimeError: NetCDF: file not found
However if I download the same file, it works -
url = '/home/tom/Downloads/ersst.201507.nc <http://ersst.201507.nc>'
nc = netCDF4.Dataset(url)
print nc
. . . .
Is it something I'm doing wrong?
Yes. URLs are not files and cannot be opened like normal files.
netCDF4 *requires* a local file as far as I can tell.
All the best,
Jason
--
Jason M. Swails
BioMaPS,
Rutgers University
Postdoctoral Researcher
Thanks for the reply but that is not what the documentation says.
http://unidata.github.io/netcdf4-python/#section8
"Remote OPeNDAP-hosted datasets can be accessed for reading over http if
a URL is provided to the netCDF4.Dataset constructor instead of a
filename. However, this requires that the netCDF library be built with
OPenDAP support, via the --enable-dap configure option (added in version
4.0.1)."
and for the Anaconda package -
http://docs.continuum.io/anaconda/changelog
"2013-05-08: 1.5.0:
Highlights:
updates to all important packages: python, numpy, scipy, ipython,
matplotlib, pandas, cython
added netCDF4 (with OpenDAP support) on Linux and MacOSX"
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