[gradsusr] Problem with maskout

[Celso Bandeira de Melo Ribeiro]

Hello Alejandro Meza and grads users,
My name  is Celso and I am trying extract daily precipitation from Merge
TRMM by INPE (NATIONAL INSTITUTE OF RESEARCH SPATIAL - Brasil) using
maskout function, same that you did.
I did one maskout ctl using MetoInfo software, following the same
proceedings but I don't know how to use this mask in grads.
The maskout ctl is:

DSET am_maskaut.dat
TITLE Mask data
UNDEF -9999
XDEF 245 LINEAR -82.8 0.2
YDEF 313 LINEAR -50.2 0.2
ZDEF 1 LINEAR 1 1
TDEF 365 LINEAR 1Jan1998 1dy
VARS 1
mask 0 99  background mask data
ENDVARS

Looking forward for any help.
Thank you,
Celso

____________________________________________
Celso Bandeira de Melo Ribeiro
Universidade Federal de Juiz de Fora - UFJF
Faculdade de Engenharia, Plataforma 4
Departamento de Engenharia Ambiental e Sanitaria
Bairro Martelos, Juiz de Fora (MG) CEP. 36036-900
tel. (32) 2102-3400
Visiting Scholar in Texas A&M University
 

On Fri, 25 Oct 2013 12:57:30 -0400, Jennifer Adams <jma at cola.iges.org>
wrote:
> Try using a local override of the time index in your expression, like
this:
> ga-> sst2 = maskout(sst1,mask.2(t=1))
> 
> --Jennifer
> 
> On Oct 25, 2013, at 12:45 PM, Alejandro Meza Mayorga wrote:
> 
>> Hello grads users. I have netcdf file containing daily sst data over a
>> year, and I need to extract the grid data over an irregular area for
each
>> day, so I used the maskout function.
>> 
>> First I created a shapefile for the area that I needed using ArcGis
>> software (1.png).
>> 
>> Then I followed the instructions posted in a previous thread by Dr.
>> Yaqiang Wang
>> (http://gradsusr.org/pipermail/gradsusr/2013-April/034603.html). So
using
>> MeteoInfo software I made a grads maskout data with the shapefile
>> (2.png), and I changed the TDEF in the maskout ctl file just as stated
>> (3.png).
>> 
>> The maskout works fine for the first day (t=1) of the data (4.png), but
>> the problem is that when I try to use another 't' different than 1 it
>> gives an error (5.png).
>> 
>> I hope you could give some ideas of what the error might be. Is it a
>> mistake of how to create the shapefile, or an error in the control
file?
>> 
>> Looking forward for your help. Thanks in advance.
>> 
>> Alejandro.
>> 
>>   
>>
<1.png><2.png><3.png><4.png><5.png>_______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
> 
> --
> Jennifer M. Adams
> Center for Ocean-Land-Atmosphere Studies (COLA)
> 111 Research Hall, Mail Stop 2B3
> George Mason University
> 4400 University Drive
> Fairfax, VA 22030

--