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Re: [ferret_users] netcdf file with irregular axis

Hi Nuncio,

If I'm not mistaken, I've had the same problem that yours. So if you have the lat-lon points irregularly spaced, you can read an ascii file with these points, take care to read both lat and lon in i and j axes, for example:

grid file:

-5.23   -45.67
-4.34   -45.23
-3.45   -45.02
-3.10   -44.50
  ...        .....
!defining axis for you have lat(i,j) and lon(i,j)
define axis/x=1:4:1 xax
define axis/y=1:4:1 yay
define grid/x=xax/y=yay gw

!reading grid file
file/format=free/grid=gw/var=alat,alon grid_file.dat

you can do:

fill alon, alat, <variable in grid pts>

I hope this helps.



On Fri, May 14, 2010 at 2:33 AM, nuncio murukesh <nuncio@xxxxxxxxx> wrote:
Hello users,
       I have a netcdf file of seaice in polar stereographic grid along
with the lat long coordinate files (two seperate nc files).  Is it
possible in FERRET to use the lat long coordinate files to convert the
polar stereographic coordinates of the seaice files to xy coordinates.
The latitude and Longitude values are irregularly spaced.
Polar Remote Sensing Division

M.Sc. Francisco das Chagas Vasconcelos Júnior
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
Email: francisco.vasconcelos@xxxxxxxxxx

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