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Re: how to create netcdf from ascii files



Hi Enils,

Example 3 (2 variables, 1 dimension) in the ASCII data section of the Ferret
user's guide explains how to read the data into Ferret. You can also create a
grid by defining the axes (lat and lon will be length 1, time will be the number
of timesteps) and the grid, and including g=gridname as a qualifier to the
command (see other messages in this thread).  Interpolating Station data on to a
2 dimensional lon/lat grid involves decisions on the resolution of the grid and
the type of analysis needed for interpolation.

Joe
----------------------------------

Enils Bashi wrote:

> Hi Joe,
>
> These are data real data collected by buoys/stations on the Chesapeake Bay.
> For the example I provided the lat and long for the buoy are (39.08,76.01).
> The lat and long for each station/buoy remains the same for each value. The
> data is reported in 15 minute intervals.
>
> Enils Bashi
> Programmer - Chesapeake Bay Program
> Veridyne Incorporated
> Annapolis, Maryland: (410) 267-9833
> www.chesapeakebay.net
>
> -----Original Message-----
> From: Joe McLean [mailto:joe.mclean@noaa.gov]
> Sent: Monday, September 22, 2003 12:13 PM
> To: Enils Bashi
> Cc: ferret (E-mail)
> Subject: Re: how to create netcdf from ascii files
>
> Hi Enils,
>
> The Ferret documentation at
> http://ferret.wrc.noaa.gov/Ferret/Documentation/Users_Guide/current/fer_html
> .htm
> (look up ASCII data) has an explanation on accessing ASCII data.  The data
> you
> show below has no Longitude or Latitude fields, how are the lat and lon
> coordinates for each value determined?
>
> Joe
> ------------------------------------------
>
> Enils Bashi wrote:
>
> > Dear Ferreters,
> >
> > I have an ascii file that contains the following data:
> >
> > 12.89       3.56        103.00  10.64   7.85        12.70
> 18.80
> > 12.94       3.59        102.10  10.54   7.80        14.80
> 21.60
> > 12.97       3.80        101.50  10.45   7.82        16.00
> 23.80
> > 13.06       3.95        101.90  10.46   7.86        15.40
> 24.00
> > 12.91       3.87        102.40  10.55   7.89        10.60
> 24.90
> > 12.86       3.85        102.40  10.57   7.89         9.50
> 20.60
> > 12.66       3.84        102.50  10.62   7.92         8.90
> 19.50
> > .......         ......        ......      ......    ......         ......
> > ......
> > .......         ......        ......      ......    ......         ......
> > ......
> > .......         ......        ......      ......    ......         ......
> > ......
> >
> > where the columns are:
> >
> > temp, salinity, dop, doc, ph, turbidity, chlorophyll
> >
> > I want to derive a netcdf defined on a grid with coordinates from 80w:72w
> > and 36n:40n
> > Any and all feedback would be greatly appreciated.
> >
> > Enils Bashi
> > Programmer - Chesapeake Bay Program
> > Veridyne Incorporated
> > Annapolis, Maryland: (410) 267-9833
> > www.chesapeakebay.net



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