[ferret_users] uneven grid from ASCII file

[Leticia Cotrim da Cunha <lcotrim@xxxxxxxx>]

Hi Ferreters,
I am in trouble trying to read an ASCII file (space) that contains the
following columns:

lon,lat,var1,...,var18

Number of lines: 1010, first line contains labels

Missing value is -1.00E+034

My problem is that lon+lat are unevenly spaced (but listed ascending). 

I managed save lon,lat in a separate cdf file like this (hint from the
user's list):
yes? define axis/npoints=1009/x=274.738:293.97 ax1
yes? define axis/npoints=1009/y=-12.4167:-55.05 ay1
yes? define grid/x=ax1/y=ay1 gg1
yes? file/var="lat,lon"/skip=1/g=gg1/ord=xy Surface_data_CHILE.csv
save/file=saved_lon_lat.cdf lon,lat ! (I have tested it, and the lon,lat
values are listed ok)

I have tried to copy the variable to a dummy file, then open the it using
the grid gg1, like this:

yes?file/var="lon,lat,TOC,CN,d15N,TP,d13Corg,BSi,CaCO3,BSiO2flx,N,P_alata,P_alata_ind,Coast_PKT,Benthic,Trop_sutrop,Upwelling,S_diat,Diatoms_valves,Freshwater"/skip=1/g=gg1/ord=xy
Surface_data_CHILE.csv

yes? list/nohead/format="comma"/file=dummy.dat
TOC,CN,d15N,TP,d13Corg,BSi,CaCO3,BSiO2flx,N,P_alata,P_alata_ind,Coast_PKT,Benthic,Trop_sutrop,Upwelling,S_diat,Diatoms_valves,Freshwater

Then tried to read it, and got the following:
yes? file/format="comma"/var=TOC/g= gg1/col=1/ord=xy dummy.dat

yes? sha toc[g=gg1]
 **TMAP ERR: Function not implemented
 Last or next-to-last record read:
274.738 /
1:0.45,-1.E+34,-1.E+34,-1.E+34,-1.E+34,-1.E+34,-1.E+34,-1.E+34,-1.E
 Data set: ./dummy.dat
 Data file: ./dummy.dat
yes? sho data 2
 currently SET data sets:
 2> ./dummy.dat (default)
 name title I J K L
 TOC TOC 1:1009 1:1009 ... ...
 
yes? list toc[i=1:10,j=1:10]
 **TMAP ERR: Success
 during SKIP reads
 Data set: ./dummy.dat
 Data file: ./dummy.dat

I have tried to have a look on the "scat2gridlaplace_xy" but I am afraid I
didn't understand it quite well...

 Any other hint? Thanks a lot!
Best
Leticia 
 
 
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Dr. Leticia Cotrim da Cunha

Associate Scientist

Bremen International Research School for Marine Sciences
"Global Change in the Marine Realm - GLOMAR"

MARUM Gebäude

Leobener Strasse

28359 Bremen - Germany

Email : lcotrim@xxxxxxxx

Tel: +49 421 218 		- 65574

Fax: +49 421 218 - 65515

--------------------------------------------------------------------------------------------------------------------

 

-- 

----------------------------------------------------------------------------------------------------------------------

Dr. Leticia Cotrim da Cunha

Associate Scientist

Bremen International Research School for Marine Sciences
"Global Change in the Marine Realm - GLOMAR"

MARUM Gebäude

Leobener Strasse

28359 Bremen - Germany

Email : lcotrim@xxxxxxxx

Tel: +49 421 218 		- 65574

Fax: +49 421 218 - 65515

--------------------------------------------------------------------------------------------------------------------