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Re: [ferret_users] Using HDF QuikSCAT gridded vectors on ferret: no grid available?



Ok, thanks Steve,

I suspected I should use define axis. Just wondering if there was another way.

Best,
Domingos.

On Tue, Oct 21, 2008 at 1:35 PM, Steve Hankin <Steven.C.Hankin@xxxxxxxx> wrote:
Hi Domingos,

>From the SHOW GRID output that you pasted in below it appears that the dataset in question lacks coordinate axes.  As-is, the "coordinates" are simply the i,j index values.  You can either work with it using the indices as the coordinates.   Or you can inform Ferret of the correct coordinates to use by means of the DEFINE AXIS command  (http://porter.pmel.noaa.gov:8980/Ferret/home/documentation/users-guide/commands-reference/DEFINE#_VPINDEXENTRY_1299)

Quite likely you can simply redefine the axes FAKEDIM5 and FAKEDIM4 using the DEFINE AXIS command.

    - Steve


Domingos Urbano wrote:
Dear all,

I'm trying to access the Level 3 QuickSCAT gridded vectors data using OpenDap on ferret.
However, the grid is not organized in degrees of latitude and longitude. How can I handle this on Ferret?
Best,
Domingos.

yes? list ASC_AVG_WIND_VEL_U[x=38w,y=-5]
 **ERROR: illegal limits: ASC_AVG_WIND_VEL_U is not in the range Y=-5
          Axis extremes are Y=0.5:720.5
yes? show grid ASC_AVG_WIND_VEL_u
    GRID GPO3
 name       axis              # pts   start                end
 FAKEDIM5  X                 1440 r   1                    1440
 FAKEDIM4  Y                  720 r   1                    720
 normal    Z
 normal    T


--
---------------------------------------------------------------
Dr. Domingos Urbano
Grupo de Modelagem Acoplada Oceano-Atmosfera - GMA
Centro de Previsão de Tempo e Estudos Climáticos - CPTEC
Instituto Nacional de Pesquisas Espaciais - INPE

Rodovia Presidente Dutra, km 40
12630-000 - Cachoeira Paulista - SP - Brasil
tel: 55(12)3186.8552 fax: 55(12)3101.2835
www.cptec.inpe.br   www.inpe.br/ingles/
------------------------------------------------------

-- 
Steve Hankin, NOAA/PMEL -- Steven.C.Hankin@xxxxxxxx
7600 Sand Point Way NE, Seattle, WA 98115-0070
ph. (206) 526-6080, FAX (206) 526-6744

"The only thing necessary for the triumph of evil is for good men
to do nothing." -- Edmund Burke



--
---------------------------------------------------------------
Dr. Domingos Urbano
Grupo de Modelagem Acoplada Oceano-Atmosfera - GMA
Centro de Previsão de Tempo e Estudos Climáticos - CPTEC
Instituto Nacional de Pesquisas Espaciais - INPE

Rodovia Presidente Dutra, km 40
12630-000 - Cachoeira Paulista - SP - Brasil
tel: 55(12)3186.8552 fax: 55(12)3101.2835
www.cptec.inpe.br   www.inpe.br/ingles/
------------------------------------------------------

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