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.mendelss...@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 <mdsum...@gmail.com> wrote: > > > > On Sat, 11 Jun 2016 at 15:43 javad bayat <j.bayat...@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: bayat...@yahoo.com > >> > >> [[alternative HTML version deleted]] > >> > >> ______________________________________________ > >> R-help@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@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.mendelss...@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: bayat...@yahoo.com [[alternative HTML version deleted]] ______________________________________________ R-help@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.
