Re: contour or shade vertical section with bottom line alongtheoceancruise

[Steve Hankin <hankin@xxxxxxxxxxxxx>]

Hi Namba,

The etopo5 grid contains 9.3 million points (words). Depending on how large
the region that you specify is, you may need to handle all of these points to
determine the valuea along an arbitrary path. You need either to SET
MEMORY/SIZE= to a larger value, or constrain your region in lat/long further.

Two additional notes:

  1. If you are using a large region (say larger than 50 degrees in lat or
     long), then the etopo20 data set is often very adequate resolution
     visually.
  2. If you need the full 5 minute resolution over very broad areas there is
     no loss of quality whatsoever through overlaying the bathymetry in
     sections.

    - steve

================================

Namba Takaya wrote:

> Dear Dr. Ansley Manke
>
> Thank you for your kind and quick help.
>
> I made it (etopo60,or etopo20) but
> When I use the etopo5 and set the rather wide region,
> the insufficient memory error come.
>
> I did
> when I start ferret,
> >ferret -memsize 10 (even larger than 10)
> and
> set memory/size=10 (even larger than 10)
>
> it dose not work.
>
> Then I make the region smaller, next
> error come like
> a program limit has been reached, xxxxxx
>   plot size is : xxxxxxxxx.
>
> Could I overcome this problem in ferret?
> Is this  because of the  memory limitation of Ferret?
> One way we use the smaller region or coarse topo file?
>
> Thank you in advance.
>
> >From: Ansley Manke <ansley@pmel.noaa.gov>
> >To: Namba Takaya <takayanamba@hotmail.com>
> >CC: ferret_users@ferret.wrc.noaa.gov, shankar@darya.nio.org
> >Subject: Re: contour or shade vertical section with bottom line along the
> oceancruise
> >Date: Fri, 20 Apr 2001 09:24:07 -0700
> >
> >Hi Takaya,
> >You can do this using the SAMPLEXY function.   See the Users Guide
> >under SAMPLEXY (chapter3, sec 2.3.34).
> >
> >yes? USE ocean_atlas_annual
> >yes? LET xlon = 234.5 + I[I=1:50]       ! define the slant line
> >yes? LET dely = 24./49
> >yes? LET ylat = 24.5 - dely*i[i=1:50] + dely
> >yes? PLOT/VS/LINE/SYM=27 xlon,ylat      ! line off Central America
> >yes? GO land
> >
> >! Now sample the field "salt" along this track and make a filled contour
> plot.
> >The horizontal axis is
> >! abstract; it is a count of the number of points along the track.
> (Figure3_3b)
> >
> >yes? LET slantsalt = samplexy(salt,xlon,ylat)
> >yes? FILL/LEVELS=(33.2,35.2,0.1)/VLIMITS=0:4000 slantsalt
> >
> >! You can add a further step to plot the bathymetry:
> >yes? USE etopo5
> >yes? LET sectionrose = samplexy(rose, xlon, ylat)
> >yes? PLOT/OVER  -1* sectionrose
> >
> >Namba Takaya wrote:
> >
> > > Dear Sir.
> > >
> > > Could you tell me how to make contour or shade
> > > the vertical section of temperature, salinity or whatever (ex. levitus
> > > climatology) with bottom line (etopo5 data)
> > > along the ocean cluise which is not parallel to zonal or meridianal?
> > >
> > > I am doing small scale (coastal) oceanography and would like to make
> > > contour or shade some parameters with  the fine bottom line (etopo5).
> > >
> > > Thank you in advance.
> > > Takaya Namba
> > >
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--
Steve Hankin
NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115-0070
ph. (206) 526-6080 -- FAX (206) 526-6744