[R] OPeNDAP access / OPeNDAP subsetting with R

[Michael Sumner]

Opendap won't work on Windows CRAN build of ncdf4, though the rgdal build
does work directly on grib.

Summary: download the files wholus for use on Windows, or set your own
system on Linux.

Building ncdf4 on Windows is not too hard if you know about doing that.

Cheers, Mike

On Wed, 28 Sep 2016, 06:49 Roy Mendelssohn - NOAA Federal <
roy.mendelssohn at noaa.gov> wrote:

> Please post the code of what you tried, as I have no idea otherwise what
> did or did not work for you.
>
> -Roy
>
> > On Sep 27, 2016, at 12:44 PM, Debasish Pai Mazumder <pai1981 at gmail.com>
> wrote:
> >
> > Hi Roy,
> > Thanks for your response. I have tried according your suggestion but it
> doesn't work.
> > the OPeNDAP link of the data
> >
> http://nomads.ncdc.noaa.gov/thredds/dodsC/modeldata/cfsv2_forecast_ts_9mon/2014/201404/20140403/2014040312/
> >
> > datafile:
> > tmax.01.2014040312.daily.grb2
> >
> > Thanks
> > -Deb
> >
> > On Tue, Sep 27, 2016 at 11:51 AM, Roy Mendelssohn - NOAA Federal <
> roy.mendelssohn at noaa.gov> wrote:
> > Look at the package ncdf4.  You can use an OPeNDAP URL in place of the
> file name to perform subsets.,
> >
> > -Roy
> >
> > > On Sep 27, 2016, at 9:06 AM, Debasish Pai Mazumder <pai1981 at gmail.com>
> wrote:
> > >
> > > Hi all,
> > >
> > > I would like to access and subset following OpeNDAP files.
> > > server:
> > >
> http://nomads.ncdc.noaa.gov/thredds/dodsC/modeldata/cfsv2_forecast_ts_9mon/2014/201404/20140403/2014040312/
> > >
> > > file name: tmax.01.2014040312.daily.grb2
> > > <
> http://nomads.ncdc.noaa.gov/thredds/dodsC/modeldata/cfsv2_forecast_ts_9mon/2014/201404/20140403/2014040312/catalog.html?dataset=modeldata/cfsv2_forecast_ts_9mon/2014/201404/20140403/2014040312/tmax.01.2014040312.daily.grb2
> >
> > > I would like to access and subset the file. Any help will be
> appreciated.
> > >
> > > with regards
> > > -Deb
> > >
> > >       [[alternative HTML version deleted]]
> > >
> > > ______________________________________________
> > > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > > https://stat.ethz.ch/mailman/listinfo/r-help
> > > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > > and provide commented, minimal, self-contained, reproducible code.
> >
> > **********************
> > "The contents of this message do not reflect any position of the U.S.
> Government or NOAA."
> > **********************
> > Roy Mendelssohn
> > Supervisory Operations Research Analyst
> > NOAA/NMFS
> > Environmental Research Division
> > Southwest Fisheries Science Center
> > ***Note new address and phone***
> > 110 Shaffer Road
> > Santa Cruz, CA 95060
> > Phone: (831)-420-3666
> > Fax: (831) 420-3980
> > e-mail: Roy.Mendelssohn at noaa.gov www: http://www.pfeg.noaa.gov/
> >
> > "Old age and treachery will overcome youth and skill."
> > "From those who have been given much, much will be expected"
> > "the arc of the moral universe is long, but it bends toward justice"
> -MLK Jr.
> >
> >
>
> **********************
> "The contents of this message do not reflect any position of the U.S.
> Government or NOAA."
> **********************
> Roy Mendelssohn
> Supervisory Operations Research Analyst
> NOAA/NMFS
> Environmental Research Division
> Southwest Fisheries Science Center
> ***Note new address and phone***
> 110 Shaffer Road
> Santa Cruz, CA 95060
> Phone: (831)-420-3666
> Fax: (831) 420-3980
> e-mail: Roy.Mendelssohn at noaa.gov www: http://www.pfeg.noaa.gov/
>
> "Old age and treachery will overcome youth and skill."
> "From those who have been given much, much will be expected"
> "the arc of the moral universe is long, but it bends toward justice" -MLK
> Jr.
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
-- 
Dr. Michael Sumner
Software and Database Engineer
Australian Antarctic Division
203 Channel Highway
Kingston Tasmania 7050 Australia

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