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Re: [ferret_users] scattered ASCII data to NetCDF



I would just add that the various scat2grid functions are approximations to the original data points. It is essential when using these to check (plot or list) some of these points to be sure that the functions are not distorting the data excessively.

Billy K

On 26/06/2008, at 7:02 AM, nguyen@xxxxxxxxxx wrote:

oups sory I didn't get your question
well in this case you can check the section "2.5. ASCII data on line":
http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/data- set-basics/ASCII-DATA especially the option /column=ncol to define the number of columns you have.
Hanh


Hanh,

Thanks for your help.

scat2grid is the following step of my job. This time, I just would like to
store my data without any interpolation.

Or, at least, I would like to read these data without specifying 170
variables in my 'file/var="..."' command.

2008/6/26 <nguyen@xxxxxxxxxx>:

Hi Paulo

there is a function "scat2grid" that grids scattered data. Check the
documentation for detailed explanations Ch3 Sec2.3:
http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/ index/index-s

Hanh

Hi Ferreters,

I have some scattered precipitation data stored in a ASCII file with
LON
in
first row, LAT in second row and with third to last rows being daily
accumulated rainfall relative to that (lon,lat) beginning at
01-jan-2008
separated by semicolons, e.g.:

-39.05;-7.37;0;0;0;0;0;0;0;0;0;0;0;23;10;5;8 ;...
-40.12;-2.88;0;9.8;0;12.6;17.2;0;0;11;0;0;0;0;0;4.2;0 ;...
-39.58;-6.08;0;0;0;0;0;0;0;0;0;0;0;0;5;20;0 ;...
-40.12;-6.57;0;0;0;3;0;0;0;0;0;0;0;0;0;0;13 ;...
-40.55;-3.58;0;0;0;0;0;0;0;6;0;0;0;0;0;0;4 ;...
-39.73;-7;0;0;0;25.9;0;0;0;0.8;0;0;0;0;2.8;9.4;9.6;0 ;...
-38.25;-5.52;0;0;0;0;0;0;0;0;0;0;0;0;2;0;2.2;...
.
.
.

The full dataset covers about 170 days and, hence, we may expect about
170
rows. I know this procedure to read ASCII data:

file/form=delim/delim="<delim>"/ var="lon,lat,day1,day2,day3,...,dayN"
my_ascii_data.txt

But it seems to be not really useful in my case.

Is there a way to produce a NC file with one variable ('precip') in a
regular time axis and irregular XY axis?

If not, should be useful a solution to read this data without
specifying
one
variable for each day (say, using file/var="<list of vars>"
my_data.txt).

Well... to finish, I would assure a nice reward for that who first
help
to
solve this problem!

Thanks


--
Ms. Paulo Henrique Santiago de Maria
Grupo de Modelagem Atmosférica
Departamento de Meteorologia e Oceanografia
Fundação Cearense de Meteorologia e Recursos Hídricos
Av. Rui Barbosa 1246 - CEP 60115-221
Fortaleza, Ceará
Fone: (85) 3101-1106 / 3101-1126





--
Ms. Paulo Henrique Santiago de Maria
Grupo de Modelagem Atmosférica
Departamento de Meteorologia e Oceanografia
Fundação Cearense de Meteorologia e Recursos Hídricos
Av. Rui Barbosa 1246 - CEP 60115-221
Fortaleza, Ceará
Fone: (85) 3101-1106 / 3101-1126






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