[R] How to get bathymetry data using R

[javad bayat]

Dear all;
Many thanks for your answers but I think I should explain more. What I want
to do is extracting bathymetry data from topography or DEM for a model that
uses .npt format.
Is there a package to do such a thing?
Thanks.

On Sat, Jun 11, 2016 at 8:39 PM, Roy Mendelssohn - NOAA Federal <
roy.mendelssohn at noaa.gov> wrote:

> Use the “rerddap” package that accesses our ERDDAP server.  You can see
> the data available at:
>
> http://upwell.pfeg.noaa.gov/erddap
>
> In the search box type in “bathymetry”.    You can subset as you want,
> using “rerddap” you get back a netcdf file that is already read into your R
> workspace,  or you can write your own 2 lines of code  (since the URL
> completely defines the request) and get the data back in any number of file
> formats.  I don’t want to get into a format war, but for large gridded
> datasets like this I much prefer netcdf files.
>
> If you have any questions at all about either the “rerddap” package
> (developed by the wonderful people at ROpenSci) or about our ERDDAP
> service, don’t hesitate to ask.
>
> -Roy
>
> > On Jun 11, 2016, at 12:30 AM, Michael Sumner <mdsumner at gmail.com> wrote:
> >
> > On Sat, 11 Jun 2016 at 15:43 javad bayat <j.bayat194 at gmail.com> wrote:
> >
> >> Dear R users;
> >> I am searching for a package to extract bathymetry data from topography
> map
> >> to produce the control file for CE-Qual-w2 model.
> >> Is there anyone to know how to do it?
> >> many thanks.
> >>
> >>
> > There are few things around but I highly recommend find your own data
> > source, suitable for your purpose - and reading it directly with the
> raster
> > package.  If anyone knows a reliable source I'd like to hear it.
> >
> > As a global go-to I use Etopo1, but you may want some more detailed (like
> > Gebco 2014) or a non-global one. (I can't tell where you need this for or
> > what resolution would be suitable from what you've asked though).
> >
> > (The best format when you get a choice generally is GeoTIFF, but it
> depends
> > who creates them. I tend to use the NetCDF files from Etopo).
> >
> > Raster uses rgdal for many formats, but ncdf4 exclusively for NetCDF - if
> > it's not called "*.nc" you can get around that).
> >
> > Cheers, Mike.
> >
> >
> >
> >> --
> >> Best Regards
> >> Javad Bayat
> >> M.Sc. Environment Engineering
> >> Alternative Mail: bayat194 at yahoo.com
> >>
> >>        [[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.
> >>
> > --
> > Dr. Michael Sumner
> > Software and Database Engineer
> > Australian Antarctic Division
> > 203 Channel Highway
> > Kingston Tasmania 7050 Australia
> >
> >       [[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.
>
>


-- 
Best Regards
Javad Bayat
M.Sc. Environment Engineering
Alternative Mail: bayat194 at yahoo.com

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