Re: [ferret_users] use a finer coastline with go land and go fland

["William S. Kessler" <William.S.Kessler@xxxxxxxx>]

Thanks to Jaison for that information.

There is another piece of mapping data that would be useful to have  
available: EEZ boundaries. Since many nations' EEZ still have  
unsettled claims or other disputes, these are not final, nevertheless  
they are needed for a variety of purposes. For example I needed to  
draw EEZ lines on maps of a recent cruise clearance request.

I could not find a source of EEZ coordinates that came easily into  
Ferret. This is mostly due to the fact that most of the boundaries  
are still unofficial, thus no government or international agency  
produces them. The best I could do is the site of the Flemish Marine  
Data and Information Centre (http://www.vliz.be/vmdcdata/marbound/ 
index.php), which distributes estimated, unofficial boundaries in an  
xml format. If you go to "Search Database" or "Map Interface" from  
this site, you get an xml file that contains a list of lat/lon  
coordinates for individual countries or regions that can be extracted  
(by hand in a text editor) and thus read into Ferret. Not the best  
solution, but it works.

If anyone knows a better way to get this data, please let the group  
know.

Billy K

On Nov 22, 2006, at 9:28 AM, Jaison Kurian wrote:

> Hi All,
>         Though Temothee got a solution to his question, i think this
> information will be useful to all those to interested in fine  
> resolution
> bathymetry data.
>
>      There is a recent article in Marine Geophysical Researches, by  
> Marks and
> Smith on "An Evaluation of Publicly Available Global Bathymetry Grids"
> (see http://springerlink.metapress.com/content/w86v85v5u66g3841/
> ?p=e22bda9684ef4291a7373478dba4b34b&pi=2) (Volume 27, Number 1, 2006,
> DOI 10.1007/s11001-005-2095-4) which talks about Etopo2, GEBCO and few
> other datasets. This is an excellent article and if you are  
> interested in
> fine resolution bathymetry, you should read it.
>
>      Regarding the topography/coastline datasets, Etopo5 is not the  
> finest
> resolution available now (as mentioned in earlier mails). There are  
> datasets
> like GEBCO, Etopo2 and GLOBE (only land elevation) which are having
> resolutions of 1 Minutes, 2 Minutes and 1 Km respectively. Here is  
> a list of
> freely available global datasets. This is only a beginning and the  
> list is,
> for sure, not complete. I hope that those who know about any other  
> datasets
> or relevant web sites will include those to the present list and  
> make it as
> a good source of information.
>
>     Please note that the ocean topography or land elevation  
> datasets can be
> used to create new coastline dataset (extracting lat & lon for zero  
> depth/
> elevation) but read the dataset documentation, especially about the  
> data
> processing, to know how reliable will be the coastline derived like  
> this.
>
> Please see the list below....which is extended as far as i can....
>
> Hope this helps,
>
> Regards,
>
> Jaison
>
>  List of free, Global, Ocean Topography/Land Elevation/Coastline/ 
> River datasets
>   
> ====================================================================== 
> ========
>
>  1. ocean topography
>  ----------------------------------------
>  Dataset Name : Etopo2 (Smith and Sandwell)
>  Resolution   : 2 Minute
>  Source       : NOAA NGDC
>  Data format  : NetCDF
>  On Web       : http://dss.ucar.edu/datasets/ds759.3/
>                 http://ngdc.noaa.gov/mgg/fliers/06mgg01.html
>                 http://www.ngdc.noaa.gov/mgg/fliers/01mgg04.html
>                 http://ferret.pmel.noaa.gov/cgi-bin/nph-dods/data/ 
> PMEL/
>                       smith_sandwell_topo_v8_2.nc --> dods
>                 http://www.ferret.noaa.gov/cgi-bin/dods/nph-dods/
>                       data/smith_sandwell_topo.nc --> dods
>                 http://www.ngdc.noaa.gov/mgg/fliers/97mgg03.html -- 
> > poster
>
>  Dataset Name : Etopo5
>  Resolution   : 5 Minute
>  Source       : NOAA NGDC
>  Data format  : NetCDF
>  On Web       : http://dss.ucar.edu/datasets/ds759.1
>                 http://ingrid.ldeo.columbia.edu/SOURCES/.WORLDBATH/
>                 http://ferret.pmel.noaa.gov/cgi-bin/dods/nph-dods/ 
> data/
>                         PMEL/etopo5.nc --> dods
>
>  Dataset Name : General Bathymetric Chart of the Oceans (GEBCO)
>  Resolution   : 1 Minute
>  Source       : BODC
>  Data Format  : NetCDF (274 MB zip file)
>  On Web       : http://www.bodc.ac.uk/data/online_delivery/gebco/
>  Note         : Though this dataset is 1 Minute resolution, it misses
>                     features which the lower-resolution ETOPO2  
> captures,
>                     due to over smoothing. See the following link  
> for a
>                     comparison :
>                     http://www.vterrain.org/Elevation/Bathy/ 
> bathy_comp.html
>
>  2. land elevation
>  -----------------
>  Dataset Name : GLOBE
>  Resolution   : 1 Km,  Gridded
>  Source       : NOAA NGDC
>  Data format  : NetCDF
>  On web       : http://iridl.ldeo.columbia.edu/ 
> SOURCES/.NOAA/.NGDC/.GLOBE/
>                 http://www.ngdc.noaa.gov/mgg/topo/globe.html
>  Note         : Etopo2 and Etopo5 (see above) also have land  
> elevation.
>
>
>  3. Ridge Bathymetry
>  --------------------
>  Dataset Name : Ridgembs Relational Database
>  Resolution   : Variable, can be as high as 50 m where data exists.
>                    No global coverage (wherever data is not  
> available, Etopo2
>                    is used as a regional background map).
>  Source       : Lamont-Doherty Earth Observatory (together with  
> RIDGE & NSF)
>  Data Format  : NetCDF/ASCII
>  On Web       : http://ocean-ridge.ldeo.columbia.edu/database/html/ 
> home.html
>                 http://www.marine-geo.org/geomapapp/about.html
>
>
>  4. coastline/shoreline data
>  ---------------------------
>  Dataset Names: 4a) NOAA/NOS Medium resolution coastline, 1:70,000
>                 4b) World Vector Shoreline, 1:250,000
>                 4c) World Data Bank II, 1:2,000,000
>                 4d) World Coast Line, 1:5,000,000
>  Resolution   : .....
>  Data Format  : ASCII
>  Source       : NOAA NGDC
>  On Web       : http://rimmer.ngdc.noaa.gov/mgg/coast/getcoast.html
>                 http://www.ngdc.noaa.gov/mgg/shorelines/ 
> shorelines.html (home)
>  Note         : Ferret does have a really nice FAQ about "Detailed  
> Coastlines
>                   and Borders" at
>                   http://www.ferret.noaa.gov/Ferret/FAQ/graphics/ 
> coastlines.html"
>                   which describes how to use the dataset from this  
> source for
>                   drawing borders in Ferret.
>
>  5. Political/International/Internal boundaries
>  ----------------------------------------------
>  Dataset Names: 5a) World Data Bank II Political boundaries
>                 5b) World Data Bank II International Boundaries
>                 5c) World Data Bank II Internal Boundaries
>                 5d) World Vector Shoreline & All political boundaries
>  Resolution   : .....
>  Data Format  : ASCII
>  Source       : NOAA NGDC
>  On Web       : http://rimmer.ngdc.noaa.gov/mgg/coast/getcoast.html
>                 http://www.ngdc.noaa.gov/mgg/shorelines/ 
> shorelines.html (home)
>
>
>  6. Rivers
>  ----------
>  Dataset Name : World Data Bank II Rivers
>  Resolution   : .....
>  Data Format  : ASCII
>  Source       : NOAA NGDC
>  On Web       : http://rimmer.ngdc.noaa.gov/mgg/coast/getcoast.html
>                 http://www.ngdc.noaa.gov/mgg/shorelines/ 
> shorelines.html (home)
>
>  7. Where to Look for more informations?
>  ---------------------------------------
>  http://dss.ucar.edu/catalogs/list_auto/topo.html
>  http://www.gfdl.noaa.gov/products/vis/data/datasets/index.html
>  http://ioc.unesco.org/oceanteacher/OceanTeacher2/06_OcDtaMgtProc/
>                  05_DtaAnal&Prods/08_SelectProds/SelAnalProds.htm
>  http://www.vterrain.org/Elevation/Bathy/index.html
>  http://topex.ucsd.edu/marine_topo/text/topo.html
>
>  You can also check :
>          http://topex.ucsd.edu/WWW_html/srtm30_plus.html
>          http://fermi.jhuapl.edu/abyss/documents/HOTSWG3.3.pdf
>          http://www.gcc.ntu.edu.tw/modelsplanning/database/ 
> gcrc_databank/
>               datamanage/DISasia/igbp-dis/activity_summary/ 
> summary_act1_8.html
>
>
>  8. More about Etopo2
>  --------------------
>  CleanTOPO2 : CleanTOPO2 is a touched up and generalized version of  
> SRTM30
>               Plus, a public domain dataset that combines sea floor  
> and land
>               elevation data of the entire world.
>               On Web : http://www.shadedrelief.com/cleantopo2/
>
>
>  General Notes about sites listed above
>  --------------------------------------
>  a) With dss.ucar & bodc.ac.uk you have to create an account (it is  
> free) in
>        order to download datasets. While creating account with  
> bodc.ac.uk,
>        keep the final page where the verification code is to be  
> pasted as it
>        is, and wait for a mail from bodc. Once you get the mail  
> copy and paste
>        the verification code on the box provided.
>
>  b) Citations for above datasets are available/mentioned in the  
> respective
>        web pages.
>
>  c) Links which marked as "--> dods" can be accessed via DODS,  
> using Ferret.
>
> ====================================================================== 
> ==========
>
> On Mon, 20 Nov 2006, Ansley Manke wrote:
>
> > Both the etopo05 and the Smith and Sandwell topography dataset are
> > available from the PMEL OPeNDAP server. Use them in Ferret with the
> > commands:
> >
> >     use
> > "http://ferret.pmel.noaa.gov/cgi-bin/nph-dods/data/PMEL/ 
> > smith_sandwell_topo_v8_2.nc"
> >
> > Or,
> >
> >    use
> > "http://ferret.pmel.noaa.gov/cgi-bin/dods/nph-dods/data/PMEL/ 
> > etopo5.nc"
> >
> > I was able to double-check the addresses by searching the OPeNDAP  
> > list
> > of data under the "OPeNDAP Datasets
> > <http://www.opendap.org/data/datasets.cgi? 
> > xmlfilename=datasets.xml&exfunction=none>"
> > link at http://www.opendap.org/data/
> >
> > To substitute the Smith-Sandwell data set for the ETOPO datasets in
> > fland.jnl, you would need to make your own copy of fland.jnl and edit
> > it. These datasets are too large in general to use for plots the  
> > whole
> > globe (the screen or plot image wouldn't have that much resolution
> > anyway), or for large regions, but they're great for seeing the  
> > details
> > of small regions.
> >
> > Ansley
> >
> > william s. kessler wrote:
> > > The 5-minute etopo dataset is called etopo05 (note the zero).
> > >
> > > There is a 2-minute topography dataset from Smith and Sandwell (1994
> > > JGR 99(B11) 21803-21824), which should be available somewhere (for
> > > free?). That is as good as exists today, I think.
> > >
> > > Billy K
> > >
> > > On 20Nov 2006, at 6:56 AM, Timothée Brochier wrote:
> > >
> > > > Hello ferreters,
> > > >
> > > > The standart go land has a poor resolution at my scale, and the go
> > > > fland is even worse
> > > >
> > > > I tried go land 5 but it says I don't have etopo5 and didn't manage
> > > > to install it (I think we have to pay for it?)
> > > > BUT I could download a .dat file from the coastal extractor, wich
> > > > contain the coastline at a very fine resolution.
> > > > Is it possible to use the go fland method with that data?
> > > >
> > > > many Thanks,
> > > >
> > > > Timothée
> > > > Mensaje no contiene virus y
> > > > otros contenidos peligrosos.
> > > > MailScanner agradece su apoyo.